| A | B |
|---|
| organelle | a tiny cell structure that carries out a specific function within the cell |
| cell wall | a rigid layer of nonliving material that surrounds the cells of plants and some other organisms |
| cell membrane | a cell structure that controls which substances can enter or leave the cell |
| nucleus | the cell's control center, directing all of the cell's activities; acts as the "brain" of the cell |
| chromatin | material in cells that contains DNA and carries genetic information |
| cytoplasm | the region between the cell membrane and the nucleus |
| lysosome | a small round cell structure that contains chemicals that break down large food particles into smaller ones |
| endoplasmic reticulum | a cell structure that forms a maze of passageways in which proteins and other materials are carried from one part of the cell to another |
| ribosome | a small grain-like structure in the cytoplasm of a cell where proteins are made |
| Golgi body | a structure in a cell that receives proteins and other newly formed materials from the endoplasmic reticulum, packages them, and distributes them to other parts of the cell; the cell's "mailroom" |
| chloroplast | a structure in the cell's of plants and some other organisms that captures energy from sunlight and uses it to produce food |
| vacuole | a water-filled sac inside a cell that acts as a storage area |
| mitochondria | rod-shaped cell structures that produce most of the energy needed to carry out the cell's functions; the "powerhouses" of the cell |
