Across
- 4. Largest air tubes after trachea
- 6. The protein in red blood cells that carries oxygen
- 7. Tube connecting larynx to bronchi
- 10. What organ do we use to breathe
- 11. What part of the nose filters the air we breathe
- 16. The term for the tiny blood vessels surrounding alveoli
- 17. Tiny hair like structures that help clean the airways
- 18. What protects the lungs in the chest
- 19. What gas do we exhale
- 20. What do we inhale from the air
Down
- 1. Disease marked by airway inflammation and wheezing
- 2. Membrane that lines the thoracic cavity
- 3. Voice box
- 5. External opening for air entry
- 8. Main site of gas exchange in the lungs
- 9. Protective fluid between pleura layers
- 12. The thin flap that covers the trachea during swallowing
- 13. Main muscle involved in inhalation
- 14. Functional zone where gas exchange occurs
- 15. Process of taking air into the lungs