| A | B |
|---|
| Metabolic rate | rate at which an organism uses energy. |
| mucus | thick sticky substance secreted by the mucous membranes in the body. |
| pharynx | passageway between mouth and nose, esophagus and larynx called the throat. |
| esophagus | tube connecting pharynx and stomach. |
| larynx | "voice box" which produces voice sounds. |
| trachea | tube which carries air between the pharynx and the lungs. |
| bronchioles | One of many tiny branches from the bronchi which carries air to and from alveoli in the lung. |
| alveoli | microscopic sacs in which the exchange of gases takes place in the lungs. |
| diaphragm | Muscle at the base of the thoracic cavity which allows for breathing. |
| alimentary canal | Digestive tract |
| peristalsis | series of muscular contractions that moves food along the alimentary canal. |
| chyme | semiliquid mixture of digestive juices and partly digested food in stomach and small intestines. |
| villi | velvety like projections lining the wall of the small intestines. |
| bile | substance secreted by the liver which emulsifies fats into small droplets which aids digesion. |
