Across
- 3. bones protecting the lungs
- 5. the smallest, thinnest type of blood vessel
- 7. 🫁
- 8. the scientific name for "windpipe"
- 11. the gas that we breath in
- 12. sweep mucus out of the lungs (hair like)
Down
- 1. the gas that we breath out
- 2. prevents food from entering the trachea
- 4. includes both the mouth and the nose
- 6. the scientific name for "throat"
- 9. the "little sacs" where gas exchange happens
- 10. these cells produce mucus