Across
- 3. filters, warms, moistens air. Filtering by tiny hairs, cilia. [air can also come in mouth...presumably with less warming, moistening, and filtering]
- 5. nose and mouth airways meet
- 6. covers the trachea when we swallow, to stop food going down
Down
- 1. branches to distribute air throughout lungs
- 2. (voice box) at top of trachea, holds vocal chords
- 4. air sacs at ends of bronchioles, surrounded by blood capillaries, for gas exchange
- 7. (wind pipe) for transport of air to the lungs, additional filtering/cleaning of air by tiny hairs