Across
- 3. bring oxygen into the body
- 5. air sacs where oxygen
- 9. Ent, specializes
- 10. closes off trachea during swallowing
- 13. progressive, long term, loss of function
- 15. a group of lung diseases
Down
- 1. breathing out
- 2. covers the outer surface of the lungs
- 4. Provide mucus
- 6. 2 large tubes
- 7. "the voice box"
- 8. muscle that separates
- 11. "windpipe"
- 12. taking air in
- 14. "the throat"