Across
- 5. hair like structures that trap dust
- 6. small air sacs at the ends of the bronchioles
- 8. We exhale
- 10. air can also enter through here
- 11. we inhale _____
Down
- 1. smaller tubes that lead into the alveoli
- 2. windpipe through which air travels to bronchi
- 3. flap that covers the entrance to the trachea
- 4. two short tubes where air enters the lungs
- 7. dome shaped muscle that lets the chest expand
- 9. air enters through the ____