| A | B |
|---|
| Enzymes | Proteins that speed up the rate of chemical reactions in living things |
| Excretion | The removal of all the wastes produced by the cells of the body |
| Homeostasis | The ability of an organism to maintian a stable internal environment even when the external environment changes |
| Hormone | A chemical produced in the endocrine glands |
| Immunity | The body's ability to destroy pathogens before they cause disease |
| Inorganic | A type of molecule that does not contain both carbon and hydrogen but can contain any other combination of elements |
| Metabolism | All the chemical reations that occur within the cells of an organism |
| Mitochondria | Organelles that contain enzymes used to extract energy from nutrients |
| Nucleus | A large structure within a cell that controls the cells's metabolism and stores genetice information, including chromosomes and DNA |
| Organ | A body structure made of different kinds of tissues combined to perform a specific funtion |
