Cells

1. control center of the cell
8. a vesicle that contains digestive enzymes for the breakdown of excess or worn-out cellular substances
10. a framework for the cell within the cytoplasm
11. projections from cell surfaces that aid in locomotion and feeding
12. double membrane organelle with thylakoids containing chlorophyll where photosynthesis takes place
13. apparatus a flattened stack of tubular membranes that modifies proteins and packages from the distribution outside the cell

2. reticulum a highly folded membrane that is the site of protein synthesis
3. mebrane-bound vesicle for the temporary storage of materials
4. a membrane-bound organelle that makes energy available to the rest of the cell
5. site of protein synthesis
6. similar to cilia
7. membrane a flexible boundary that controls the movement of substances into and out of the cell
9. wall An inflexible barrier that provides support and protects the plant cell
11. organelles that occur in pairs and are important for cell division