Across
- 2. A pair of breathing tubes that branch from the trachea into the lungs
- 6. Process through which oxygen is taken in and carbon dioxide is let out
- 11. Windpipe that acts as a filter
- 12. A thin tube that branches from a bronchus
- 14. Membrane that secretes a fluid to allow breathing to be easy
- 17. A pair of tissues in the larynx that vibrate and produce sound
- 18. A flap in the throat that blocks the windpipe when food or liquid is swallowed
Down
- 1. Sheet of muscle that contracts and flattens out
- 3. Bring air into the nose and protect the nasal passage
- 4. Allows air to pass through so the lungs can receive it
- 5. Process that takes place in the alveoli and exchanges CO2 and O2
- 7. Involved in breathing and sound production
- 8. The main system that allows us to breathe
- 9. Blowing out air
- 10. Breathing in air
- 13. An opening through which food is taken in
- 15. Tiny sacs where oxygen and carbon dioxide are exchanged
- 16. The alternate inhalation and exhalation of air
- 19. Organ that is a passageway for food and air