1. Cell Structure and Function
3.2 Looking Inside Cells
Cell Structure and Function

2. Cell Wall Rigid layer of nonliving material
Surrounds the cells of plants and some other organisms
Protects and supports
Made of cellulose
Strong, but permeable

3. Cell Membrane Barrier separating the cell from its environment
Controls what substances enter and exit a cell
Semi-permeable

4. Nucleus
Control center of the cell
Contains the DNA

5. Cytoplasm
Clear, thick, gel-like fluid
Contains many organelles

6. Mitochondria Small, rod-shaped organelles "Powerhouses" of the cell
Convert food energy into energy the cell can use

7. Endoplasmic Reticulum
Maze of passageways
Helps form proteins
Carries material throughout the cell

8. Ribosome Small, grain-like body
Some are attached to endoplasmic reticulum
Some float freely in the cytoplasm
Protein "factories"

9. Golgi Body Flattened sacs and tubes
Receive proteins to be packaged and distributed to other parts of the cell or even outside the cell

10. Chloroplasts Large, green structures Generally found only in plants
Capture energy from sunlight and convert it into sugar

11. Vacuole Large water-filled sac Storage areas
Plant cells usually have one large, central vacuole

12. Lysosome Small, round structures
Contain chemicals for breaking down certain materials
Clean-up crew