| A | B |
|---|
| cell membrane | outer covering of a cell |
| cytoplasm | gelatinlike material inside a cell |
| nucleus | directs all cell activities |
| organelles | process energy and manufacture substances needed by other cells |
| mitochondria | stores energy and releases energy needed by the cells from food |
| golgi bodies | stacked, flattened membranes |
| cell theory | all cells come from cells, all organisms are made of cells, cells are the basic unit of organization |
| virus | a strand of hereditary material surrounded by a protein coating |
| tissue | a group of similar cells that work together to do one job |
| organ | a structure that is made of two or more types of tissue that work together |
| endoplasmic reticulum | folded membranes in which material can be processed and moved around inside a cell |
