Across
- 4. muscle under the lungs that helps you breathe
- 7. space in nose where air is filtered
- 11. tiny blood vessels around alveoli
- 13. movement of air in and out of lungs
- 14. throat area that connects nose and mouth to airway
- 16. two main branches from trachea into lungs
- 18. flap that closes airway when you swallow
- 19. process of breathing air out
Down
- 1. tube that carries air from throat to lungs
- 2. substance that keeps alveoli from collapsing
- 3. small tubes inside lungs that carry air
- 5. waste gas you breathe out
- 6. voice box located above trachea
- 8. process of gas exchange in the body
- 9. another name of trachea
- 10. tiny air sacs where oxygen enters blood
- 12. process of breathing air into lungs
- 15. thin membrane that covers the lungs
- 17. gas your body needs to survive
- 20. organs where breathing and gas exchange happen