| A | B |
|---|
| Cell membrane | protective outer covering of all cells that regulates the interactions between the cell and the environment |
| Cell theory | states that all organisms are made up of one or more cells, the cell is the basic unit of life, and all cells come from other cells |
| Cell wall | rigid structure that encloses, supports, and protects the cells of plats, algae, fungi, and most bacteria |
| Chloroplast | green, chlorophyll-containing, plant-cell organelle that uses light energy to produce sugar from carbon dioxide and water |
| Cytoplasm | constantly moving gel-like mixture inside the cell membrane that contains hereditary material and is the location of most of a cell’s life processes |
| Endoplasmic reticulum | cytoplasmic organelle that moves materials around in a cell and is made up of a complex series of folded membranes; can be rough (with attached ribosomes) or smooth (without attached ribosomes) |
| Golgi body | organelles that package cellular materials and transport them within the cell or out of the cell |
| Host cell | living cell in which a virus can actively multiply or in which a virus can hide until activated by environmental stimuli |
| Mitochondrion | cell organelle that breaks down food and releases energy |
| Nucleus | organelle that controls all the activities of a cell and contains hereditary material made of proteins and DNA |
| Organ | structure, such as the heart, made up different types of tissues that all work together |
| Organelle | structure, in the cytoplasm of a eukaryotic cell that can act as a storage site, process energy, move materials, or manufacture substances |
| Ribosome | small cytoplasmic structure on which cells make their own proteins |
| Tissue | group of similar cells that work together to do one job |
| Virus | a strand of hereditary material surrounded by a protein coating that can infect and multiply in a host cell |
