| A | B |
|---|
| respiratory system | supplies the body with oxygen and removes carbon dioxide |
| breathing | process of bringing in air and removing waste gases |
| respiration | process of using oxygen to break down glucose for energy |
| nasal cavity | traps dust and moistens air |
| pharynx | tube-like passageway used by food, liquids, and air |
| epiglottis | flap at end of pharynx that prevents food and liquids from enetering the airway |
| larynx | tube where vocal cords are attached |
| trachea | tube lined with mucus and cilia to filter air and let it pass |
| bronchi | short tubes at the end of the trachea that carry air to the lungs |
| alveoli | tiny, thin-walled sacs that exchange oxygen and carbon dioxide with the capillaries |
| diaphragm | muscle beneath lungs that controls breathing |
| inhale | diaphragm contracts to let air into the lungs |
| exhale | diaphragm relaxes to push air out of lungs |
| carbon dioxide | exhaled by respiratory system |
| oxygen | inhaled by respiratory system |
