The Respiratory System
Across
- 5. The air we breathe
- 6. Alternates the structure of the lungs.
- 9. The organ used to inhale
- 11. The muscle that inflates and deflates the lungs
- 12. waste gas
Down
- 1. Small air tubes
- 2. Sacs of air
- 3. The organs that work together to help you breathe
- 4. The pipe that send air into the bronchioles
- 7. Splits air into each lung
- 8. Protects the organs.
- 10. The process that moves gases from high to low