| A | B |
|---|
| organ systems | group of organs working together to perform a certain function |
| nucleus | usually largest organelle in the cell which directs all the cell's activities |
| long and hollow | type of plant cell that transports food and water |
| electron microscope | tiny objects are magnified up to a million times by this insturment |
| tissue | groups of similar cells that do the same work |
| membrane | materials enter and leave the nucleus through openings in this |
| common cold | a viral disease for which there is no vaccine |
| lysomes | organelles that contain digestive chemicals |
| vacuoles | membrane-bound spaces for temporary storage in cells |
| compound light microscope | has two sets of lenses to magnify an object |
| scanning electron microscope | gives a three-demensional view of an object |
| mitochondria | where the energy in food is stored until it is released |
| nucleus | directs all the activities of the cell |
| organelles | structures with the cytoplasm of eukaryotic cells |
| cell wall | protects the cells of plants |
| cell membrane | protective layer around all cells |
| cytoplasm | gelatin-like material inside cell membrane |
| Golgi bodies | flattened membranes that package cellular substances |
