| A | B |
|---|
| Cell membrane | thin envelope that surrounds a cell and allows passage of materials into and out of the cell |
| Cell wall | outermost boundary of plant cells that is made of cellulose |
| Chloroplast | cell organelle containing chlorophyll |
| Cell | basic unit of structure and function in living things |
| Cytoplasm | region between the cell membrane and the cell nucleus |
| Endoplasmic reticulum | tubular passageways through which substances are transported |
| Lysosome | structure involved in the digestive activities of the cell |
| Mitochondria | powerhouses of the cell |
| Nucleus | cell structure that directs all the activities of the cell |
| Organelle | "tiny organs" that make up a cell |
| Ribosome | protein-making site of the cell |
| Vacuole | sac in the cytoplasm that stores materials |
