The Respiratory System
Across
- 2. small air sacs
- 4. breathing in
- 7. another name for trachea
- 8. cage protects heart and lungs
- 9. portable treatment device
- 10. another name for voicebox
- 11. protects the lungs
Down
- 1. flap of skin that stops food from entering the airway
- 3. breathing out
- 5. air enters here
- 6. females fastest growing population of smokers