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1 CELLS, CELLS, CELLS

2 A Look At Cells Graphics: Microsoft Clipart

3 Cells Defined as the basic unit of living things.

4 Cell Theory All living things are made of cells Cells are the basic units of structure and function of living things Living cells only come from other living cells.

5 Overview In the same way there are different kinds of cells inside you, different organisms have different types of cells. Trees have different cells than you and so do monkeys. Each of those cells is different in some way.

6 Cells and Organelles help Homeostasis perform homeostasis Is the process of any living thing that allows it to live and regulates its internal environment so as to maintain a stable, constant condition. Example: You get hot and sweat!

7

8 Oraganelles ORGANELLES mean little organs. Basically this means that organelles have specific roles to play in how cells work just like organs help the body to function properly as a whole.

9 Cell wall - protects plant cells; gives cell support

10 Cell Membrane - skin around all cells that controls what goes in and out of cell

11 Cytoplasm - syrupy liquid that transports and stores materials

12 Nucleus - control center of the cell; tells other cell parts what to do

13 Chromosomes aka DNA -directions for the cell; tells cell what to do

14 Endoplasmic Reticulum - Provides parts for proteins; stores parts for ribosomes

15 Ribosomes - builds proteins for the cell

16 Mitochondria - Power House ; turns food into energy for work

17 Chloroplast -converts sunlight energy into sugar

18 Vacuoles - storage container for cell, contains food and water

19 Lysosomes -digests food and kills invaders

20 Golgi Body a set of flattened, membranebound sacs that serves as the packaging and distribution center of the cell

21 Key Terms Organelles-structures that make up a cell Cell Wall-outer most part of a cell Cell Membrane-just inside the cell plant wall which forms the outer covering of the cell Nucleus-brain of the cell

22 Vocabulary Cell Membrane: The purpose of the cell membrane is to hold the cell together. It keeps all of the pieces, like the organelles and the CYTOPLASM, inside. Cell Wall: Cell walls help the plant maintain its shape. Walls also help the plant keep its structure consistent Nucleus: The NUCLEUS is like the brain of the cell. If you take the nucleus out of a cell it dies. It is the thing that tells every part of the cell what to do. It even tells the cell when to divide. Endoplasmic Reticulum: The purpose of the ER is to collect proteins and create something called steroids and store ions

23 More Words To Know Vacuoles: Vacuoles are bubbles that float in the cell. Those bubbles store the different molecules a cell needs to survive. Some contain food and others hold oil. There are even vacuoles that hold onto waste products. Ribosomes: Ribosomes are the protein builders of the cell. When they build proteins, scientists say that they SYNTHESIZE the proteins. Ribosomes are found either floating around in the CYTOPLASM or attached to the Endoplasmic Reticulum (ER). The floating ribosomes synthesize proteins that will be used inside the cell. The ribosomes attached to the ER make proteins that will be used inside the cell AND sent outside the cell.

24 Vocabulary Mitochondria: The big thing you need to remember about MITOCHONDRIA is that they are the cell's little powerhouses. They are the thing that lets cells survive. Their whole purpose is to break down food molecules so that the cell has the energy to live. Chloroplasts: Chloroplasts are very much like mitochondria. The big difference is that instead of taking food and breaking it down into energy, chloroplasts take energy from the sun and create food.

25 Vocabulary Lysosome: Lysosomes combine with the food taken in by the cell. The enzymes in the lysosome bond to the food and start to digest it.

26 Cell Types Plants Animals

27 Plant vs. Animal

28 Plant cells Plant cells have different structures than animal cells. Plant cells have something called a CELL WALL while animals do not. Plant cells have an organelle called a CHLOROPLAST that takes energy from the sun and converts it into sugars. Does your body make sugar from the sun or do you get it from food?

29

30 Animal Cells Animal cells organize the body. You have brain cells, stomach cells, bone cells, and many other types of cells. Each is different from the others. Nerve cells conduct electrical impulses through the body. There are cells in your intestine that absorb nutrients from the food you eat. Stomach cells secrete an acid to digest your food Do you think that your skin cells can absorb the nutrients from your lunch? Why not?

31 Typical Animal Cell

32 Eukaryotic vs. Prokaryotic Cells Eukaryotic Cells: Bigger than Pro cells Have a nucleus Prokaryotic Cells: -Usually smaller than Eu cells -Have NO nucleus

33 SUMMARY CELLS!

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