| A | B |
| Nutrition | The life function that involves taking materials from the environment and changing them into usable forms called nutrients. |
| Nutrients | The substances that na organism needs for energy, growth, repair, or maintenance. |
| Ingestion | Taking in food from the environment. |
| Digestion | Breaking down complex food materials into simpler forms that an organism can use. |
| Transport | The process by which substances enter and leave cells and become distributed within the cells. |
| Respiration | The process of releasing chemical energy. |
| Synthesis | Combining simpler substances chemically to form more complex substances. |
| Assimilation | The incorporation of materials into the organism's body. |
| Growth | The process by which living organisms increase in size. |
| Excretion | The removal of cellular wastes from an organism's body. |
| Regulation | All of the activities that help to maintain an organism's homeostasis. |
| Reproduction | The process by which living things produce new organisms of their own kind. |
| Metabolism | All of the chemical reactions occuring within the cells of an organism. |
| Homeostasis | Maintaining a stable, internal environment. |
| Egestion | The process of eliminating excess food wastes. |
| Cyclosis | The swirling of cytoplasm in a cell to transport materials within it. |
| Aerobic | A form of respiration involving the use of oxygen. |
| Anaerobic | A process of respiration that does not use oxygen. |
| Asexual | A form of reproduction that involves one parent. |
| Sexual | A form of reproduction that involves two parents. |