Across
- 2. small air tubes
- 3. a muscle that inflates and deflates the lungs
- 5. Protects the organ
- 7. air sacs
- 9. splits air into each lung
- 10. changes the structure of the lungs
- 12. Where air enters the body
Down
- 1. waste gas
- 4. It is the pipe that sends air into the lungs
- 6. the process whereby gases move from high to low
- 8. The air we breath
- 11. It is the organ that collects the air