Across
- 3. Carries air from the bronchus, deep into each lung.
- 6. Carries air from the bronchioles to each air sac.
- 7. Delivers air to the lungs.
Down
- 1. Where oxygen goes into the blood and carbon dioxide comes out.
- 2. Where oxygen gets into the body.
- 4. Makes sounds.
- 5. Protects the lungs.