| A | B |
|---|
| Cell membrane | protective outer covering that regulates interaction between cell and environment |
| Cytoplasm | constantly moving gel-like mixture inside cell membrane that contains the organelles |
| Cell wall | Rigid structure that encloses, supports and protects plants, fungi, algae, most bacteria |
| organelle | Structure in the cytoplasm of eukaryotic cell |
| nucleus | organelle that controls all activities of a Eu. cell and contains DNA |
| chloroplast | In plant cells food is made in green organelles in the cytoplasm |
| mitochondrion | organelles where energy is released from breaking down food into CO2 and water |
| ribosome | small cytoplasmic structure on which cells make their own proteins |
| endoplasmic reticulum | organelle that moves materials around in a cell made of folded membranes |
| Golgi body | organelles that package cellular materials and transport them within the cell or out of the cell |
| tissue | group of similar cells that work together to do one job |
| organ | structure of two more more different types of tissues that work together |
| cell theory | all organisms are made up of one or more cells--basic unit of life |
| virus | strand of hereditary materials surrounded by protein coating that can infect and multiply in a host cell |
| host cell | living cell in which a virus can actively multiply or can hide |
