Across
- 4. Windpipe that connects larynx to bronchi
- 6. Disease where alveoli lose elasticity
- 7. Process of removing air from the lungs
- 11. Shared passageway for air and food
- 12. Voice box located above the trachea
- 14. Process of breathing air into the lungs
- 15. Protein in red blood cells that carries oxygen
- 17. Waste gas removed from the body
- 19. Filters, warms, and moistens incoming air
- 20. Chest cavity that houses lungs
- 21. Condition causing airway narrowing and wheezing
- 26. Tiny blood vessels surrounding alveoli
- 27. Hair-like structures that trap debris
Down
- 1. Smaller airway branches inside the lungs
- 2. Bacterial lung infection spread through air
- 3. Infection causing fluid in alveoli
- 5. Exchange of gases between body and environment
- 8. Flap that prevents food from entering airway
- 9. Gas required for cellular respiration
- 10. Double membrane surrounding the lungs
- 13. Muscle that contracts to allow inhalation
- 16. Inflammation of the bronchial tubes
- 18. Movement of air in and out of lungs
- 22. Sticky substance that traps particles and pathogens
- 23. Movement of gases from high to low concentration
- 24. Tiny air sacs where gas exchange occurs
- 25. Two main branches that enter the lungs