Across
- 1. Prevents aspiration
- 3. sinus A part of immune system in nose
- 6. Carries air into the lungs
- 7. Move stomach while breathing
- 9. Struggle to breathe
Down
- 2. exchange oxygen and carbon dioxide during the process of breathing in and breathing out
- 4. Allows a passage of air into and out the lungs
- 5. You use it to breathe
- 8. cavity a space between the visceral and parietal pleura