| Term | Definition |
| cell wall | rigid structure that gives support to a cell |
| cytoskeleton | web of proteins in the cytoplasm |
| endoplasmic reticulum | system of folded membranes in which proteins,, lipids, and other materials are made |
| mitochondrion | organelle in which sugar is broken down to produce ATP |
| chloroplasts | organelles in plant and algae cells in which photosynthesis takes place |
| photosynthesis | process by which plants and algae use sunlight, carbon dioxide, and water to make sugar and oxygen |
| golgi complex | organelle that packages and distributes proteins |
| vesicle | small sac that surrounds material to be moved into or out of a cell |
| lysosomes | organelles that contain digestive enzymes |
| vacuole | large vesicle that stores water and other materials |