1. Cells and Their Organelles

2. Cell Membrane Phospholipid bilayer
Separates inside of cell from environment
Maintains homeostasis via selective permeability

3. Cell Wall
Firm, protective structure that gives the cell its shape in plants, fungi, most bacteria, and some protists

4. Cytoplasm Jelly-like substance in the cell
Suspends and protects organelles

5. Vacuole
Stores material within the cell

6. Ribosome
The sites of protein synthesis

7. Golgi Apparatus
Packages proteins for transport out of the cell

8. Endoplasmic Reticulum
Network of membranes found throughout the cell
Smooth: stores substances
Rough: synthesize and package proteins

9. Central Vacuole Store water for plants
Provide structure for plants when full

10. Chloroplast
Contains chlorophyll, a green pigment that traps energy from sunlight and gives plants their green color
Site of photosynthesis

11. Mitochondria
Produces a usable form of energy (ATP) for the cell

12. Nucleus Controls all the cell functions in a eukaryotic cell
Contains DNA

13. Nucleolus
Site where ribosomes are made

14. Nuclear Membrane
Keeps all of the chromatin and nucleolus inside

15. Lysosomes
Digests excess or worn-out cell parts, food particles and invading viruses or bacteria using enzymes

16. Microtubules Proteins that help define cell structure and movement
Form part of the cytoskeleton

17. Nuclear Pores
Allows RNA and proteins to pass through

18. Centrioles
Help animal cells divide