| A | B |
|---|
| cell membrane | thin structure that surrounds a cell |
| cytoplasm | gel-like substance inside the cell where most of the cell's activities take place |
| nucleus | nuclei: control center of a cell |
| nuclear membrane | thin structure that surrounds andprotects the nucleus |
| organelle | small structure in the cytoplasm that does a special job |
| mitochondrion | structure that releases enerby for a cell |
| endoplasmic reticulum | small network of tubes inside a cell that substances move along |
| ribosome | small,round structure that makes protein |
| Golgi | body: organelle that packages and sends materials to other places in the cell |
| vacuole | space in the cytoplasm that stores the different substances a cell needs to survive |
| lysosome | small, round structure that breaks down nutrient molecules and old cell parts |
| cell wall | thick outer layer that surrounds the cell membranes of plants and some simple organisms |
| cellulose | carbohydrate, made up of many sugar molecules, that forms most of the cell wall of a plant cell |
| chloroplast | organelle in a plant cell that contains chlorophyll |
| chorophyll | green material in chloroplasts that is needed by plants to make food |
