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chapter 7
Anatomy and Physiology Key Terms
| Term | Definition |
|---|---|
| carbon dioxide (CO2) | Tasteless, colorless, odorless gas produced by body cells during the metabolic process |
| cartilage | Tough, elastic connective tissue that is more rigid than ligaments but less dense than bone |
| cilia | Any hairlike structure |
| diffuse | Moving or spreading out of a substance at random, rather than by chemical reaction or application of external forces |
| homeostasis | State in which the regulatory mechanisms of the body maintain a constant internal environment |
| mucous membrane | Moist tissue layer lining hollow organs and cavities of the body that open to the environment; also called mucosa |
| oxygen (O2) | Tasteless, odorless, colorless gas essential for human respiration |
| pH | Symbol that indicates the degree of acidity or alkalinity of a substance |
| septum | Wall dividing two cavities, such as the nasal septum, which separates the two nostrils |
| serous membrane | Thin layer of tissue that covers internal body cavities, the cells of which secrete a fluid that keeps the membrane moist; also called serosa |