Across
- 3. tiny hairs in the nose and trachea that catch particles
- 5. this tube carries air to the lungs
- 6. when oxygen enters the body
- 7. openings to the nasal cavity that filters/moistens air
- 9. tube behind nasal cavity that carries food and air
- 10. air passages in lungs, branch into smaller tubes
Down
- 1. small flap that keeps food out of the lungs
- 2. when oxygen leaves the body
- 4. sacs at end of bronchi, turn oxygen into carbon dioxide
- 8. exchange of oxygen for carbon dioxide, breathing