Across
- 4. the smallest blood vessels in the body
- 6. organ used to pump blood around the body
- 10. pipe that delivers air to the lungs
- 12. is emitted when we exhale
- 14. hairs that line the nostrils to keep mucus out
- 15. a flap in the throat that stops food from entering the windpipe
- 17. also known as the voice box
- 18. two external openings of the nasal cavity
- 20. a muscle that contracts continually when you inhale and exhale
- 22. connects the bronchioles to the alveoli
- 23. the branches that divide from the bronchus
- 25. the organ used to breathe
Down
- 1. the act of breathing out
- 2. a condition where the airways swell and fill with mucus
- 3. the main passageway into the lungs leading from the trachea
- 5. the group of muscles that run between the ribs
- 7. bones that protect the lungs and heart
- 8. tiny sacs that allow for rapid gaseous exchanges
- 9. a group of alveoli
- 11. cushions the lungs from rubbing against the ribs
- 13. a large air-filled space in the middle of the face
- 16. the act of breathing in
- 19. also is known as the throat
- 21. a slimy substance secreted for lubrication or protection
- 24. the gas we need to survive