Across
- 6. the voice box
- 7. process of taking in oxygen and releasing carbon dioxide
- 9. Tiny branches of the bronchi
- 10. where gas exchange happens
- 11. The windpipe
Down
- 1. mechanical process of moving air in and out of the lungs
- 2. The tubes that branch off from the trachea
- 3. A sticky substance that traps dust and particles
- 4. type of gas expelled during exhalation
- 5. muscle that buldges upward during exhalation
- 8. type of gas received during inhalation