Figure 1. Cladogram of the Major Animal Phyla based upon SSU-rRNA
|
|
- Owen Virgil Anderson
- 5 years ago
- Views:
Transcription
1 Biology 4B Laboratory Invertebrates II: Mollusca, Annelida and Nematoda Objectives To understand the basic differences among the invertebrate animal phyla To investigate and learn the obvious external and internal characteristics of annelids, nematodes, arthropods and echinoderms To investigate at the microscopic level the organization and function of selected tissues and cells within these groups Figure 1. Cladogram of the Major Animal Phyla based upon SSU-rRNA INTRODUCTION In this laboratory, we will survey three of remaining five invertebrate phyla: Mollusca, Annelida and Nematoda (Figure 1). We have only studied one of the five major protostome phyla. Of the remaining major phyla of protostomes in which we will study in this laboratory, only the annelids exhibit metamerism, the division of the body into segments (you will study arthropods in the Inverts III laboratory). Segmentation is advantageous during development, where greater efficiency is obtained by constructing a whole organism out of identical somites or segments. In the adult, locomotor activity is enhanced because of the independent nature of each segment and the flexibility afforded by a series of segmented parts. Segmentation also gives these phyla a survival advantage. Since many segments are similar to other segments in form and function, damage to one or several segments does not necessarily compromise body functions. PHYLUM MOLLUSCA Triploblastic eucoelomate animals The molluscs are classified as triploblastic eucoelomate animals, as are all phyla remaining to be examined. Most molluscs are bilaterally symmetrical and have well-defined circulatory, respiratory, excretory, and digestive systems. With nearly 50,000 species, the molluscs are a large group, second only to arthropods. The name "mollusc" is derived Biology 4B Laboratory Invertebrates II Page 1 of 7
2 from the Latin molluscus ("soft"), indicating that the molluscs are soft bodied animals. The group includes the snails, bivalves, chitons, squid, octopuses, and others. In some forms, the soft bodies are protected by a calcareous shell. The organisms in the phylum Mollusca are characterized by having three main body areas: a head-foot (sensory and locomotion structures), a visceral mass (excretory, digestive, and circulatory structures), and a mantle (which secretes the shell). The gills, which function in respiration, are located between the visceral mass and the mantle. In this lab we will look at four classes: Class Polyplacophora, the chitons; Class Gastropoda, the snails and slugs; Class Bivalvia, the clams, oysters, and allies; Class Cephalopoda, the squid, octopus, and chambered nautilus. Class Polyplacophora This class is considered the least advanced of the phylum. These animals are entirely marine, and have oval bodies with a shell consisting of eight dorsal plates. A broad, flat foot used in locomotion is located ventrally. The mantle cavity is reduced to a groove running on either side of the body between the foot and the margin of the animal. Figure 12. Chiton foot anatomy Examine the chitons on display. In some cases you will see only the eight dorsal plates diagnostic of the class. In the preserved jars you will also observe the ventral foot and perhaps the mouth on the anterior end (Figure 12.) Class Gastropoda This class includes snails and slugs. It is by far the largest class of molluscs. Gastropods are primarily marine, but some species also inhabit freshwater and terrestrial habitats. In all forms, the visceral mass is located enclosed in a coiled shell during early developmental stages. In most gastropod species the shell is retained in the adult, but in some, such as the common garden slug, it has been completely lost. Because of this, slugs are restricted to moist areas to prevent desiccation. Observe several of the snail shells in present in the lab. Notice the type of coiling and external decoration of these shells. Observe the slug, nudibranchs and other gastropod specimens in the lab Class Bivalvia Members of this class are characterized by a shell consisting of two valves or halves. Bivalves use a muscular foot for locomotion. Siphons are used to draw in a stream of water which is passed over the gills for feeding and respiratory purposes. You will now complete a as directed below. Examine the clam externally. Find the two valves, the hinge ligament that holds them together, the swollen umbo at the anterior end of the hinge, and the lines of growth. Using the position of the hinge and umbo, determine which side is dorsal, which side is ventral which end is anterior, and which end is posterior. Internal Clam Structures (Figure 14): Locate the position of the anterior adductor muscle and posterior adductor muscle through the narrow opening between the valves. Slip a scalpel between the mantle and the left valve. Use the scalpel to gently pry the adductor muscles away from the valve to which they are attached. Loosen the mantle Figure 13. Internal shell anatomy of clam Biology 4B Laboratory Invertebrates II Page 2 of 7
3 over the entire area of the left valve and open the clam. Examine the inner surface of the empty valve. Notice its smooth nacreous surface. Observe the position of the various muscle scars, including anterior adductor muscle scar, posterior adductor muscle scar, anterior protractor muscle scar, anterior foot retractor muscle scar, and posterior foot retractor muscle scar. Also note the pallial line, which is the point where the mantle attaches to the shell (Figure 13). Look at the mantle, including the pallial muscle. The mantle of the left and right valves comes together posteriorly to form a ventral incurrent aperture and a dorsal excurrent aperture that allow water to enter and exit the mantle cavity. Water enters through the incurrent aperture and leaves through the excurrent aperture. Figure 14. Internal anatomy of the clam The space between the mantle and the body is the mantle cavity. Lift the mantle to expose the visceral mass, foot, gills, and associated structures. The muscular, wedge-shaped foot is at the ventral aspect of the body. The soft tissue making up the bulk of the body is the visceral mass. Between the mantle and the visceral mass lie two gills. At the anterior margin of the visceral mass, note the smaller, flap-like, labial palps. Labial paips surround, and direct food toward, the mouth. Water coming in from the incurrent aperture reaches the ventral aspect of the gills and passes dorsally through the gills into a suprabranchial chamber. Water is then directed posteriorly and out of the mantle cavity through the excurrent aperture. In the process, suspended food particles are filtered and gas exchange occurs. Food particles are transported by cilia to food grooves along the dorsal margin of the gills. Cilia in the food grooves transport food to the labial palps. Return the mantle to its original position and locate the pericardium, a thin membrane dorsal to the visceral mass. The circulatory system of bivalves is an open system in which blood leaving the heart flows freely between the organs. Carefully open the pericardium to see the heart. The heart wraps around the intestine where the intestine emerges from the visceral mass. The intestine is running posteriorly to empty at the excurrent aperture. The heart consists of two parts, a thick-walled ventricle surrounding the intestine and two thin-walled auricles attached at either side of the ventricle. If you were careful in removing the pericardium, you should see both. Look for a dark mass of tissue ventral to the pericardial sac. This is an excretory organ known as a nephridium. Nephridia remove metabolic waste products from the blood and release the waste into the mantle cavity near the excurrent aperture. Finally, use your scalpel to make a sagittal section of the foot and visceral mass. Within the visceral mass note the cut sections of intestine. The yellowish-brown tissue surrounding the intestine is gonad. Class Cephalopoda The cephalopods are considered to be the most advanced class of molluscs. These organisms have a highly evolved visual system, and tentacles with suction cups. They are all marine. They are fast swimmers and use jet propulsion as a means of locomotion (Figure 15). Biology 4B Laboratory Invertebrates II Page 3 of 7
4 Figure 15. External and Internal anatomy of squid, Loligo Examine the preserved squid (Loligo). Find the following structures: eight arms, two tentacles, mantle (enclosing the visceral mass), lateral fins, eyes, located just anterior to the mantle, siphon - protruding from below the mantle. Water drawn into the mantle cavity can be forcefully expelled through the siphon when muscles of the mantle contract, resulting in jet propulsion. The siphon can direct the jet of water in different directions. Compare the external anatomy of an octopus to the squid, noting the difference in the shape of the mantle and the octopus's lack of fins. PHYLUM ANNELIDA Members in the phylum Annelida are often referred to as segmented worms because of their segmentation, a distinguishing characteristic that sets them apart from other animals. The most recognizable members include the earthworms (terrestrial habitat), leeches (terrestrial and freshwater), and marine worms. All annelids are triploblastic, bilaterally symmetrical, and eucoelomate. In addition, annelids exhibit a body wall with both longitudinal and circular muscle layers (which, along with segmentation mentioned above, allows these animals to be quite mobile). They have a complete digestive tract. Their nervous system shows some degree of cephalization with a brain and two ventral nerve cords that running the entire length of the body. They have a closed circulatory system with aortic arches that act Biology 4B Laboratory Invertebrates II Page 4 of 7
5 as the heart to pump blood through muscular blood vessels. They also have a well-developed excretory system which removes waste from the blood and coelom. There are three major classes within the phylum Annelida, described below. Class Polychaeta - mostly marine worms, such as Nereis (the clamworm) Class Hirudinea - the leeches (predominantly freshwater), such as Hirudo Class Oligochaeta - mostly freshwater and terrestrial worms, such as Lumbricus (the earthworms) CLASS POLYCHAETA Polychaete worms are mostly a marine group of worms characterized by many segments with a pair of parapodia with numerous setae (Figure 16). They have a distinct head with eyes, palps and tentacles. Examine a clamworm (Nerius). These are the typical polychaete worms that can be found living in the mud and debris of shallow coastal waters. Using the dissecting scope, observe the head region and find the following: eyes, mouth on the ventral side, jaws, and tentacles. Examine one of the segments. Locate a parapodium on one side a body segment. Parapodia function in locomotion and respiration for polychaetes. Each parapodium is comprised of two lobes which bear numerous setae (the reason for the class name). CLASS OLIGOCHAETA Figure 16: Structure of a clamworm (Nerius) Like polychaete worms, oligochaete worms are also segmented both outside and inside. However, oligochaetes do not have parapodia, their head is less developed and they have fewer setae. The most noticeable external feature in this group is the clitellum (figure 3). Most members in this class are either terrestrial (most) or inhabit freshwater. Obtain an earthworm (Lumbricus) and place the animal in a dissecting tray. You may need a dissecting scope to fully appreciate the external anatomy. The first four segments comprise the head region. Find the mouth on the first segment (Figure 17). The prostomium overhangs the mouth. They have a complete digestive tract that terminates on the last segment with the anus. The most obvious external feature is the clitellum, a swollen area in the anterior third of the specimen. This region functions in reproduction by secreting a mucous which holds the participants together during sperm exchange and cocoon formation around the fertilized eggs. Orient the worm dorso-ventrally by locating the tiny setae (hairs). Figure 17. Anterior end of the earthworm Run your fingers along the animal to feel the rough texture produced by the setae. Four of these structures are found on the ventral surface of each metamere. They provide traction during locomotion. CLASS HIRUDINEA The best known member in this class is the freshwater leech. Other members can be found on land and the marine environments. Members in this class typically have segments with a clitellum. Most do not have setae and no members have parapodia. Members have both anterior and posterior suckers. Biology 4B Laboratory Invertebrates II Page 5 of 7
6 Examine representative members in this class. The medicinal leech, Hirudo medicinalis, secretes an anticoagulant on the host they parasitized them. This leech was commonly used in the practice of blood-letting. It is still used today to increase circulation to surgical areas, especially with finger reattachments. Note the smaller oral sucker and larger posterior sucker. PHYLUM NEMATODA Triploblastic pseudocoelomates The development of a body cavity (coelom) is considered a major evolutionary advantage over those animals which do not possess a body cavity (acoelomate). As you have already learned, body cavities are advantageous for a number of reasons, such as to provide more room for organ development, to provide an increased surface area for diffusion of gases and/or nutrients, and to facilitate locomotion by serving as hydrostatic skeleton. A body cavity (Figure 18) is characteristic of all bilateral animals above the acoelomates. A true coelom is a cavity in which the inner body wall and the visceral organs are lined with peritoneum. A pseudocoeiom, found in animals to be examined in the present exercise, is defined as a body cavity that is lined by mesoderm externally and endoderm internally (figure 4). The nematodes are one of several phyla usually discussed together as the pseudocoelomates because of their shared possession of this structure. Except for this one common feature, they are a diverse group of animals, only distantly related. Included in this broad group of animals are the Phyla Rotifera, Nematomorpha, Gastrotricha, Kinorhyncha, and others. We will examine members of the phylum Nematoda as a representative pseudocoelomate. However, nematodes are grouped with arthropods as an ectodyzoan due to molecular evidence supporting ecdysis, the ability to shed the exoskeleton as the organism grows. Nematodes have a worldwide distribution that include, terrestrial, freshwater, marine and parasitic forms. They are round worms with a tough, flexible cuticle that is non;living. Nematodes are important ecologically for their recycling and decomposition capabilities. Figure 4: Comparison of body cavities. Figure 18. Triploblastic body plans: acoelomate, pseudocoelomate and coelomate. OBSERVATION OF NEMATODA Examine the male and female intestinal roundworm, Ascaris lumbricoides, in dissecting tray. Gloves should be worn, if available. If not, handle organism with forceps. Do not touch with bare skin. Ascaris is sexually dimorphic and sexes are easily differentiated. Male worms are smaller, typically have a hook-shaped sideways bend near their posterior end, and may have tiny copulatory spicules protruding slightly from the cloaca. Ascaris is an intestinal parasite of vertebrates, with A. lumbricoides infecting up to 64% of individuals living Biology 4B Laboratory Invertebrates II Page 6 of 7
7 in the southeastern United States. The female lays up to 200,000 eggs/day which passes out of the host via their feces. The embryo is very resistant, thus be careful handling these worms as you could potentially infect yourself. Examine the slide of a trichina worm, Trichinella spiralis. You will be observing calcified cyst of the juvenile trichina worm (Figure 19) in the muscle of the host. Trichinosis is the disease that is caused by the trichina worm. Human infestations are typically due to the ingestion of undercooked meats such as pork. Roughly 2% of the population in the US has a light infection with trichina worms. Heavy infestations may cause death. Other species that can be infected include: hogs, rats, dogs, cats and any other omnivorous or carnivorous species. Figure 19: Encysted juvenile Trichinella spiralis Examine the slide of a hookworm, Necator americanus. Note the anterior portion of the worm with a hook-like appearance in a tissue section. Infestations results when the juvenile hookworm comes in contact with the skin and burrows into the host. The juvenile then travels via the bloodstream to the lungs, move up the respiratory tract and then swallowed. In the small intestines they will mature. Examine a slide of pinworms, Enterobius vermicularis. These worms live in the large intestines of humans and are the most common nematode parasite. These infestations are more embarrassing than debilitating. The female will travel to the anus at night to deposit eggs around the anus. Scratching contaminates the hands and bedding. The eggs are then swallowed and hatch in the duodenum and mature in the large intestines. This is a very common infestation in children. Examine the free-living nematode, the vinegar eel (Tubatrix aceti) on a depression slide, if available. These worms have a high tolerance to low ph. Describe how the body bends. Biology 4B Laboratory Invertebrates II Page 7 of 7
PHYLUM MOLLUSCA Soft bodied Triploblastic Mouth and Anus True Coelum Bilaterally symmetrical Moist environments
PHYLUM MOLLUSCA Soft bodied Triploblastic Mouth and Anus True Coelum Bilaterally symmetrical Moist environments http://infusion.allconet.org/webquest/phylummollusca.ht ml Mollusca Phylum Mollusca includes
More informationAn Introduction to the Invertebrates (part 4?!) Annelida & Nematoda. Reference: Chapter 33.3, 33.4
An Introduction to the Invertebrates (part 4?!) Annelida & Nematoda Reference: Chapter 33.3, 33.4 More Relationships Slime molds Tubulinids Entamoebas Nucleariids Fungi Choanoflagellates Animals Excavata
More informationAscaris lumbricoides, human roundworm text pp complete straight digestive tract intestine is flattened, reproductive organs more rounded
BSC 201L (15e) Lab #4: Nematodes, Small Protostome Phyla AND Annelida Use the text and figures in Exercise 10 (Nematodes and Small Protostome Phyla) AND in Exercise 12 (Annelids) to aid your study of the
More informationThe Animal Kingdom: The Protostomes. Protostomes 4/16/2012. Chapter 30
Porifera Acoelomates ates The Animal Kingdom: The Protostomes Chapter 30 Protostome Bilateral Protostomes Acoelomates ates Characterized by spiral cleavage determinate cleavage (fixed fate of cells) of
More informationDearolf BIOL 220. CLADE METAZOA CLADE EUMETAZOA CLADE BILTERIA CLADE PROTOSTOMIA CLADE LOPHOTROCHOZOA Phylum Ectoprocta
CLADE LOPHOTROCHOZOA Phylum Ectoprocta Hickman Chapter 15 Some Evolutionary Experiments Phylum Ectoprocta (Bryozoa) Zooid Zoecium Lophophore Statoblasts Helpful website: http://www.earthlife.net/inverts/bryozoa.html
More informationKINGDOM ANIMALIA CHARACTERISTICS
KINGDOM ANIMALIA CHARACTERISTICS EUKARYOTIC MULTICELLULAR HETEROTROPHIC (by ingestion) MOVE AT SOME POINT IN LIFE (not all - sponges are sessile) DIGEST FOOD TO GET NUTRIENTS LACK CELL WALLS CHARACTERISTICS
More informationINVERTEBRATE DIVERSITY
INVERTEBRATE DIVERSITY 1 INVERTEBRATES Animals that lack a backbone Invertebrates 2 1 ANIMAL DEVELOPMENT Meiosis Egg Sperm Zygote Adult Blastula hollow ball of cells in a developing animal Gastrula Stage
More informationLOPHOTROCHOZOA. Find the whole mount slide of Bugula or Pectinatella. Add the zoids to the drawing below. Find and add the lophophores.
LOPHOTROCHOZOA 1.a. Examine specimens of preserved and fossil ectoprocts. How do they resemble colonial hydroids? This kind of similarity between organisms in different clades is called what? 1.b. Find
More informationKingdom Animalia. Zoology the study of animals
Kingdom Animalia Zoology the study of animals Summary Animals are multicellular and eukaryotic. consume and digest organic materials thereby being heterotrophs. Most are motile at some time in their lives.
More informationChps : Animals. Characteristics of kingdom Animalia: Multicellular Heterotrophic Most are motile Possess sense organs
Chps 23-26: Animals Chps. 23-27: Animals Characteristics of kingdom Animalia: Multicellular Heterotrophic Most are motile Possess sense organs Animal Characteristics Forms of symmetry: Radial Bilateral
More informationInvertebrate Diversity
CHAPTER 23 Invertebrate Diversity Summary of Key Concepts Concept 23.1 Diverse animals share several key characteristics. (pp. 494 496) More than a million living species of animals are organized into
More informationc. Can you locate the planaria eyespots? What do the eyespots sense?
Invertebrate Lab II Learning Objectives State the phyla of the organisms discussed in the lab activities Use the characteristics of symmetry, coelom, embryo tissue layers, and patterns of development to
More informationIntroduction to Animal Kingdom. Invertebrates and Vertebrates
Introduction to Animal Kingdom Invertebrates and Vertebrates Introduction To Animals Vertebrate animal with a backbone. Invertebrate animal without a backbone; includes more than 95% of all animal species
More informationIntroduction to Animals
Introduction to Animals Characteristics of Animals multicellular Except for sponges, animal cells are arranged into tissues. Tissues are necessary to produce organs and organ systems. Tissues, organs,
More informationResources. Visual Concepts. Chapter Presentation. Copyright by Holt, Rinehart and Winston. All rights reserved.
Chapter Presentation Visual Concepts Transparencies Standardized Test Prep Introduction to Animals Table of Contents Section 2 Animal Body Systems Objectives Identify the features that animals have in
More information2. There are roughly this many described species in the phylum Mollusca. A) 1,000 B) 10,000 C) 100,000 D) 1 million E) 10 million
Chapter 11 1. Molluscs are A) deuterostomes. B) ecdysozoaons. C) lophotrochozoans. D) chordates. E) hemichordates. 2. There are roughly this many described species in the phylum Mollusca. A) 1,000 B) 10,000
More information2/17/2017. Lecture 10: Chapter 31 Protostome Diversity
1 Lecture 10: Chapter 31 Protostome Diversity 2 3 Protostomes: one of two monophyletic groups of bilaterally symmetrical, coelomate animals The other group is the Deuterostomes Differ in pattern of early
More informationEukaryote Phylogeny. Glycogen. Kingdom Animalia. Amoebozoa Animalia. Plantae. Chromalveolata Rhizaria. Fungi. Excavata
Eukaryote Phylogeny most protozoans, brown algae, & water molds Excavata Chromalveolata Rhizaria Plantae Amoebozoa Animalia Fungi cpsts. w/ 2 memb. chitin, hyphae glycogen eukaryotic cells (nucleus, etc.)
More informationLab 37 Platyhelminthes and Nematoda
Lab 37 Platyhelminthes and Nematoda - Bilateral symmetry - Protostome (mouth 1 st ) development - Mesoderm present - Two groups: lophotrochozoa and edcysozoa - Body cavity may be present or absent Phylum
More informationThe Mollusks. Phylum Mollusca
The Mollusks Phylum Mollusca Mollusks- Latin molluscus = soft Coelomates Exhibit cephalization Many mollusks have larval stage- trochophore Hatch from egg case Easily dispersed by ocean currents and tides
More informationAnimal Phyla: A Summary. Danilo V. Rogayan Jr. Faculty, College of Education, Arts and Sciences Ramon Magsaysay Technological University
Animal Phyla: A Summary Danilo V. Rogayan Jr. Faculty, College of Education, Arts and Sciences Ramon Magsaysay Technological University Phylum Platyhelminthes The phylum consists of four classes Turbellaria
More informationUNIT 8A MARINE SCIENCE: Lower Invertebrates
UNIT 8A MARINE SCIENCE: Lower Invertebrates Essential Questions: What are the characteristics of the simple body structured organisms? Unit Objectives/I Can Statements: General Invertebrates 1. List taxa
More informationChapter 33: Invertebrates
Name Period Chapters 31, 32, and 33 should be considered as a single unit, and you should try to put all of them together in a single conceptual framework. Due to the scope of our course, you are likely
More information2. Examine the external anatomy of the squid and identify the following structures: tentacles, arms, fins, siphon, mantle, eyes and collar.
Cephalopod Anatomy As their name implies, members of the class Cephalopoda have modified head-foot which bears an array of prehensile tentacles and arms at the cranial end of the body. The visceral mass
More informationBiology 11. The Kingdom Animalia
Biology 11 The Kingdom Animalia Objectives By the end of the lesson you should be able to: Describe the 5 ways we classify animals Symmetry Germ layers Body plan Segmentation Animal Evolution Hank Video
More informationA. Incorrect! Sponges are mostly marine animals. This is a feature of sponges.
College Biology - Problem Drill 15: The Evolution of Animal Diversity Question No. 1 of 10 1. Which is not a feature of the phyla porifera- sponges? Question #01 (A) Most are marine animals. (B) They have
More informationRevision Based on Chapter 25 Grade 11
Revision Based on Chapter 25 Grade 11 Biology Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A cell that contains a nucleus and membrane-bound organelles
More informationToday: Animal Body Plans. Animal Body Plans: The Gut. The Animal Kingdom- General Characteristics: Animal Body Plans: Symmetry
Today: Exploring the Animal Kingdom Introduction to Ecology The Animal Kingdom- General Characteristics: Multicellular Heterotrophic (via ingestion) Eukaryotes Require Oxygen for aerobic respiration Reproduce
More informationIntroduction to Animals
Introduction to Animals Moving Forward Quizlet Each section we cover, 1 group will go to our class on Quizlet and create 20 flash cards on the topic (/5mks) If I warn you about talking while I m talking,
More informationAnimal Diversity I: Porifera, Cnidaria, Ctenophora, Platyhelminthes, and Lophotrochozoa
1 Animal Diversity I: Porifera, Cnidaria, Ctenophora, Platyhelminthes, and Lophotrochozoa Objectives: Be able to distinguish radial symmetry from bilateral symmetry. Be able to identify which of the phyla
More informationZoology Mollusks Block 1 Nabinger
Mollusks Block 1 Nabinger Purpose This lesson is intended to introduce the phylum Mollusca and to go over its general physical characteristics. It will also be used to setup a comparison between the major
More informationCarolina Biological Supply Company. SQUID INK-QUIRY: Inquiry-Based Invertebrate Anatomy Through Squid Dissection
Carolina Biological Supply Company SQUID INK-QUIRY: Inquiry-Based Invertebrate Anatomy Through Squid Dissection Objectives Learn ways to incorporate inquiry methods in dissection laboratories Motivate,
More informationClassification. The three-domains. The six-kingdom system. The traditional five-kingdom system. Bacteria Archaea Eukarya
Classification The three-domains Bacteria Archaea Eukarya The six-kingdom system Bacteria Archaea Protista Plantae Fungi Animalia The traditional five-kingdom system Monera Protista Plantae Fungi Animalia
More informationChapter 8-9 Intro to Animals. Image from:
Chapter 8-9 Intro to Animals Image from: http://animaldiversity.ummz.umich.edu/index.html Zoology Definition: the scientific study of the behavior, structure, physiology, classification, and distribution
More informationAnimals contain specialized cells
What is an Animal? Kingdom Animalia Main Characteristics Members of the Animal Kingdom are: Eukaryotic Multicellular Heterotrophic Have cells with membranes BUT NO cell wall Animals contain specialized
More informationChapter 32. Objectives. Table of Contents. Characteristics. Characteristics, continued. Section 1 The Nature of Animals
Introduction to Animals Table of Contents Objectives Identify four important characteristics of animals. List two kinds of tissues found only in animals. Explain how the first animals may have evolved
More informationSponges. What is the sponge s habitat. What level of organization do sponges have? Type of symmetry?
Sponges What is the sponge s habitat Marine (few freshwater species) What level of organization do sponges have? Cell level Type of symmetry? None Type of digestive system (none, complete or incomplete)?
More informationANIMAL DIVERSITY AND THE EVOLUTION OF BODY PLANS
ANIMAL DIVERSITY AND THE EVOLUTION OF BODY PLANS GENERAL FEATURES OF ANIMALS Heterotrophy - obtain energy and organic molecules by ingesting other organisms Multicellularity - Many have complex bodies
More informationAre these organisms. animals or not?
1 2 3 4 5 Are these organisms 6 7 8 animals or not? 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 11 12 Typical Animal Characteristics Eukaryotic Multicellular Ability to move Reproduce Obtain food (heterotrophic)
More informationBrief Introduction to the Animal Kingdom
Brief Introduction to the Animal Kingdom Vocabulary Vertebrate Invertebrate Detritivore Asymmetry Bilateral symmetry Radial symmetry Cephalization Coelum Pseudocoelum Acoelomates Blastula Blastophore Protosome
More informationGame Ranging / Field Guiding Course. Phylum Mollusca. To gain an understanding of the morphology and biology of common molluscs.
1 Module # 2 Component # 6 Phylum Mollusca Objectives: To gain an understanding of the morphology and biology of common molluscs. Expected Outcomes: To develop a good understanding of the internal and
More informationChapter 32 Intro to Animals. Image from:
Chapter 32 Intro to Animals Image from: http://animaldiversity.ummz.umich.edu/index.html Animals Invertebrates (animals without a backbone) Porifera Cnidaria Worms Mollusks Echinoderms Arthropods Animals
More informationBiology 122L Invertebrate zoology lab Molluscan diversity lab guide Author: Allison J. Gong foot radula shell visceral mass mantle cavity
Page 1 of 1 Biology 122L Invertebrate zoology lab Molluscan diversity lab guide Author: Allison J. Gong Figure source: Brusca and Brusca, 2003. Invertebrates, 2nd edition. Sinauer Associates, Inc. The
More informationBIOS1101 Lab Notes. Contents ANIMALS. Lab 1: Animal Diversity invertebrates. Lab 2: Animal Diversity 2 vertebrates
Contents ANIMALS Lab 1: Animal Diversity invertebrates Lab 2: Animal Diversity 2 vertebrates Lab 3: Animal Structure 1 Gross morphology Lab 4: Animal Structure 2 Histology Lab 5: The Nervous System & Sensory
More informationInvertebrate Survey Lab
Answer these questions before lab. 1. What kingdom do all animals fall into? a. Protist b. Animalia c. Eukarya 2. How many phyla of invertebrates are in appendix E on pages 1074-1076? a. 9 b. 7 c. 8 3.
More informationKingdom Animalia. Special Features: Advanced nervous systems means cephalization (faces), brains, and efficient mobility (walk/run/swim/grab)
Kingdom Animalia Kingdom Animalia Cell Number: Multicellular with extensive specialization Cell Type: Eukaryotic Animal Cells (no cell wall) Food: Heterotrophic Carnivore (meat), Herbivore (plants), Omnivore
More information1 1:29 PM 2 1:29 PM. Porifera Placozoa Cnidaria Ctenophora Platyhelminthes Gastrotricha Gnathostomulida Cycliophora Rotifera Annelida
Phylum Mollusca 1 Extant Animalia ~1,300,000 species Parazoa (1.2%) Radiata (0.9%) Protostomia (3.9%) Platyzoa (2.2%) Platyhelminthes (1.9%) Others (0.3%) Lophotrochozoa (9.8%) Mollusca (8.5%) Annelida
More informationCharacteristics of Echinoderms
Characteristics of Echinoderms Adult echinoderms have a body plan with five parts organized symmetrically around a center Does not have an anterior nor posterior end or a brain Most echinoderms are two
More informationWorms and Mollusks (pp )
Worms and Mollusks (pp. 424 432) This section tells about the characteristics of the three main groups of worms and the main characteristics of mollusks. Use Target Reading Skills As you read, take notes
More informationLife Science 7 th NOTES: Ch Animals Invertebrates
Life Science 7 th NOTES: Ch 10-11 Animals Invertebrates Write the correct word in the blanks to show directions on an animal body: ** Word Bank (Posterior, Ventral, Dorsal, Anterior) top surface front
More informationArthropoda ARTHRO JOINTED PODA FEET
Arthropoda ARTHRO JOINTED PODA FEET The arthropods are a group of animals which has attained the greatest biological success largest number of species and individuals and occupy the greatest number of
More informationWhat Is an Animal? Section 25.1 Typical Animal Characteristics. I. Characteristics of Animals. Biology II Mrs. Michaelsen
What Is an Animal? Section 25.1 Typical Animal Characteristics Biology II Mrs. Michaelsen I. Characteristics of Animals A. All animals are eukaryotic, multicellular, have ways of moving to reproduce, obtain
More informationIntroduction to Animal Diversity. Chapter 23.1, 23.2 and additional
Introduction to Animal Diversity Chapter 23.1, 23.2 and additional 1 Think of an Animal... Does your choice have hair or fur? Does it have a skeleton? Over a million species of animals described 95% have
More informationFeatures of the Animal
Features of the Animal Kingdom Bởi: OpenStaxCollege Even though members of the animal kingdom are incredibly diverse, animals share common features that distinguish them from organisms in other kingdoms.
More informationWhat defines the zygote, the blastula, and the gastrula? Draw pictures.
What makes a multicellular organism multicellular? a) Multiple cells b) Multiple cells that work together c) Specialized cells d) Multiple specialized cells that work together What defines the zygote,
More informationMarine Invertebrates
Name: Date: Period: Marine Invertebrates Porifera Annelida Cnidaria Mollusca Platyhelminthes Arthropoda Nematoda Echinodermata Name Class Date Section 26 2 Sponges (pages 664 667) This section explains
More informationChapter 24 Introduction to Animals
1 Chapter 24 Introduction to Animals I. Animal characteristics A. General Animal Features Multicellular B. Feeding and Digestion a. acquire nutrients from various sources obtaining nutrients unique to
More informationAnimals are in Domain Eukarya
The Diversity of Animals 1: invertebrates Chapter 23 Animals are in Domain Eukarya Immediate ancestors are a type of Protista Key features Multicellular Kingdom Animalia Heterotrophic: gain energy by consuming
More informationAnimal Diversity I: Porifera, Cnidaria, Ctenophora, Platyhelminthes, Rotifera, Annelida
1 Animal Diversity I: Porifera, Cnidaria, Ctenophora, Platyhelminthes, Rotifera, Annelida Objectives: Be able to distinguish radial symmetry from bilateral symmetry. Be able to identify which of the phyla
More informationMOLLUSCAN AQUACULTURE - INTRODUCTION
1 MOLLUSCAN AQUACULTURE - INTRODUCTION Mollusks have been cultured since the time of the Romans, who in particular, considered oysters a delicacy. The latest aquaculture production figures from FAO (see
More informationBiology 211 (1) Exam 2 Worksheet!
Biology 211 (1) Exam 2 Worksheet Chapter 33 Introduction to Animal Diversity Kingdom Animalia: 1. Approximately how many different animal species are alive on Earth currently. How many those species have
More information23.1 Animal Characteristics EQ Although diverse, what common characteristics do all animal share?
23.1 Animal Characteristics EQ Although diverse, what common characteristics do all animal share? Sea Slug 23.1 Animal Characteristics Animals are the most physically diverse kingdom of organisms and all
More informationName Class Date. After you read this section, you should be able to answer these questions:
CHAPTER 14 3 Invertebrates SECTION Introduction to Animals BEFORE YOU READ After you read this section, you should be able to answer these questions: What structures and systems perform basic life functions
More informationClassification. Grouping & Identifying Living Things
Classification Grouping & Identifying Living Things Classifying Living Things We put livings things into three Domains Eukarya Bacteria Archaea Which are divided into 6 Kingdoms Plant Animal Fungi Protist
More informationUnit 12 ~ Learning Guide
Unit 12 ~ Learning Guide Name: INSTRUCTIONS Complete the following notes and questions as you work through the related lessons. You are required to have this package completed BEFORE you write your unit
More informationAnimals. What are they? Where did they come from? What are their evolutionary novelties? What characterizes their diversification?
Animals What are they? Where did they come from? What are their evolutionary novelties? What characterizes their diversification? What synapomorphies unite Animals Multicellular Heterotrophs (Metazoans)?
More informationBIOLOGY - CLUTCH CH.32 - OVERVIEW OF ANIMALS.
!! www.clutchprep.com Animals are multicellular, heterotrophic eukaryotes that feed by ingesting their food Most animals are diploid, and produce gametes produced directly by meiosis Animals lack cell
More information- found in bryozoans (moss animals), brachiopods (lamp shells) and phoronids (horseshoe worms)
Chapter 33 Protostome Animals - insects the phylum Arthropoda include the insects, crusraceans and myriapods and make up 40% of the total mass of organisms present 33.1 An Overview of Protostome Evolution
More informationBlastocoelomates. General Features. General Features. Phylogenetic Relationships. Phylogenetic Relationships
General Features Blastocoelomates 1. A large and heterogeneous group. a. also known as "Aschelminthes" - cavity worms. General Features b. Nearly any source you consult will have a different arrangement
More informationChapter 9. Benefits of Being Large. Levels of Organization in Organismal Complexity. Hierarchical Organization of Animal Complexity. Fig. 9.
Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 9 Architectural Pattern of an Animal Levels of Organization in Organismal Complexity Zoologists recognize
More informationCHAPTER 14 Flatworms Phylum Platyhelminthes, Mesozoa, Nemertea
CHAPTER 14 Flatworms Phylum Platyhelminthes, Mesozoa, Nemertea 14-1 14-2 General Features n Two major evolutionary advances n Cephalization n Concentrating sense organs in the head region n Primary bilateral
More information1. Why Dissect. Why are frogs a good model to use when studying the digestive system (as well as other systems)?
Name: Date: Period: Frog Dissection Virtual Lab Use the frog Dissection link that follows to answer the questions. http://www.mhhe.com/biosci/genbio/virtual_labs/bl_16/bl_16.html Introduction 1. Why Dissect.
More informationBIOLOGY. An Introduction to Invertebrates CAMPBELL. Reece Urry Cain Wasserman Minorsky Jackson
CAMPBELL BIOLOGY TENTH EDITION Reece Urry Cain Wasserman Minorsky Jackson 33 An Introduction to Invertebrates Lecture Presentation by Nicole Tunbridge and Kathleen Fitzpatrick Figure 33.UN08 Metazoa Eumetazoa
More informationI. Protostomia - Pseudocoelom
Z202-Unit3 Chapter 15 Pseudocoelomate Animals I. Protostomia - Pseudocoelom A. Structure - Embryonic blastocoel persist as a space or cavity - Pseudocoel internal cavity surrounding the gut, lacks mesoderm
More information8/23/2014. Introduction to Animal Diversity
Introduction to Animal Diversity Chapter 32 Objectives List the characteristics that combine to define animals Summarize key events of the Paleozoic, Mesozoic, and Cenozoic eras Distinguish between the
More informationIntroduction. 1 Background Information...2 Adaptation Scavenger Hunt...3 Science Standards.. 4
Please arrive 30 minutes before your program. Teachers and chaperones must be present during the staff-facilitated 45-minute program. Introduction. 1 Background Information.....2 Adaptation Scavenger Hunt......3
More informationCharacteristics of Animals
Characteristics of Animals Multicellular Cellular Organization What is this? Heterotrophic Adaptations CHAPTER 9 Cellular Organization 4 Major Functions of Animals Obtain food and water Sustain metabolism
More informationPreview 2/22 Dr. Kopeny
Preview 2/22 Dr. Kopeny Flatworms (Platyhelminthes) Simple Lophtrochozoans -bilateral symmetry -cephalization -lack organs for oxygen transport -simple organs for excreting metabolic waste -gut with single
More informationWhat Is an Animal? Animals come in many shapes, forms, and sizes. About 98 percent of all animals are invertebrates. The Kingdom Animalia
What Is an Animal? What characteristics do all animals have? Animals come in many shapes, forms, and sizes. Scientists estimate that there are between 1 and 2 million species of animals! Some, like whales
More informationInvertebrates. Invertebrate Characteristics. Body Symmetry
3 Invertebrates Key Concept Invertebrates do not have backbones, but they do have other structures to perform their life functions. What You Will Learn Invertebrates have many specialized structures that
More informationNonvascular Plants mosses, liverworts and hornworts are nonvascular plants. These lack vascular tissue which is a system of tubes that transport
Nonvascular Plants mosses, liverworts and hornworts are nonvascular plants. These lack vascular tissue which is a system of tubes that transport food, water and minerals throughout the plant. Water and
More informationPorifera Sponges Features:
Porifera Sponges The Phylum Porifera consists only of sponges, which is unique since these animals are entirely aquatic; with 98% found only in marine environments and a small percentage found in freshwater
More informationAnimal Diversity. Features shared by all animals. Animals are multicellular, heterotrophic eukaryotes with tissues that develop from embryonic layers
Animal Diversity Animals are multicellular, heterotrophic eukaryotes with tissues that develop from embryonic layers Nutritional mode Ingest food and use enzymes in the body to digest Cell structure and
More informationintroduction to the Animal Kingdom (pages $55-560) Formulating a Definition: Building Vocabulary Skills
STUDY GUIDE CHAPTER Sponges, Cnidarians, and Unsegmented Worms Section 26-1 introduction to the Animal Kingdom (pages $55-560) SECTION REVIEW With this section you began your study of the animal kingdom.
More informationAnimal Diversity. Name Date Period
Name Date Period Laboratory Objectives: After completing this lab topic, you should be able to: 1. Compare the anatomy of the representative animals, describing similarities and differences in organs and
More informationINVERTEBRATES. The Earth and Living Things. Carme Font Casanovas 1
INVERTEBRATES Living Things. Carme Font Casanovas 1 How many animals can you see? ant rose coral snake anemone fish grass bee Living Things. Carme Font Casanovas 2 Invertebrates There are animals without
More informationThe Animals, or Metazoa. Approximate proportions of animal species presently known; The true diversity of animals may be more than 90% Arthropods
The Animals, or Metazoa Are some of the best-studied organisms Comprise over a million known species Originated c. the Cambrian (~550 MYA) Most animal phyla are marine; however, due to the diversity of
More informationChapter 32 Introduction to Animal Diversity. Copyright 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings
Chapter 32 Introduction to Animal Diversity Welcome to Your Kingdom The animal kingdom extends far beyond humans and other animals we may encounter 1.3 million living species of animals have been identified
More informationOutline. v Definition and major characteristics of animals v Dividing animals into groups based on: v Animal Phylogeny
BIOSC 041 Overview of Animal Diversity: Animal Body Plans Reference: Chapter 32 Outline v Definition and major characteristics of animals v Dividing animals into groups based on: Body symmetry Tissues
More informationLecture XII Origin of Animals Dr. Kopeny
Delivered 2/20 and 2/22 Lecture XII Origin of Animals Dr. Kopeny Origin of Animals and Diversification of Body Plans Phylogeny of animals based on morphology Porifera Cnidaria Ctenophora Platyhelminthes
More informationPHYLUM MOLLUSCA. Introduction. Polyplacophora
Introduction Polyplacophora PHYLUM MOLLUSCA Because the Mollusca are designated as a phylum we know that all the organisms in the taxon must share a common body plan that they have inherited from the ancestral
More informationChapter 32, 10 th edition Q1.Which characteristic below is shared by plants, fungi, and animals? ( Concept 32.1)
Chapter 32, 10 th edition Q1.Which characteristic below is shared by plants, fungi, and animals? ( Concept 32.1) A) They are multicellular eukaryotes. B) They are heterotrophs. C) Their cells are supported
More informationBiology B. There are no objectives for this lesson.
Biology B Course Summary This is the second of two courses that comprise Biology. This course is designed to prepare the student to confidently enter and complete college-level biology courses. The Glencoe
More informationChapter 32: An Introduction to Animal Diversity
Chapter 32: An Introduction to Animal Diversity Chapter 32: An Introduction to Animal Diversity Name Period Concept 32.1 Animals are multicellular, heterotrophic eukaryotes with tissues that develop from
More informationAnimals. Chapters Exam November 22, 2011
Animals Chapters 32-35 Exam November 22, 2011 Overview of Animals Chapter 32 General Features of Animals and Evolution of the Body Plan General Features of Animals Heterotrophs Multicellular No Cell Walls
More informationThe Evolution of Animal Diversity. Dr. Stephen J. Salek Biology 130 Fayetteville State University
The Evolution of Animal Diversity Dr. Stephen J. Salek Biology 130 Fayetteville State University Create your own animal? Start with a basic plant. Make the plant into a simple animal such as a worm. Consider:
More informationBy Sudha Vashisht P.G.G.C.G. -11 CHD
By Sudha Vashisht P.G.G.C.G. -11 CHD Pila is the common Apple snail which is found in ponds ditches, rivers and in watery fileds. The soft body is covered by a coiled shell. The first chamber of the shell
More informationSponges and Cnidarians
The Animal Kingdom Multicellular Sponges and Cnidarians Biology : Chapter 26 Eukaryotic Heterotrophs Cells lack cell walls 95% are invertebrates What Animals Do to Survive Feeding Response Respiration
More informationFinal Exam Study Guide. Evolution
Name: Biology I A Final Exam Study Guide Date: Mr. Tiesler Evolution An adaptation is a physical or behavioral change that improves a population s ability to survive. Evolution is the process by which
More informationAn Introduction to Animal Diversity
Chapter 32 An Introduction to Animal Diversity PowerPoint Lectures for Biology, Seventh Edition Neil Campbell and Jane Reece Lectures by Chris Romero Overview: Welcome to Your Kingdom The animal kingdom
More information