Respiratory system

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Across
  1. 4. Name of the cavity in the nose where air enters.
  2. 6. Tiny blood vessels surrounding the alveoli.
  3. 7. Tiny hair-like structures in the airways that help trap and move particles out of the respiratory system.
  4. 9. A sticky substance that traps dust and germs in the airways.
  5. 10. A muscle that helps in breathing, located below the lungs.
  6. 14. The main organs of respiration.
  7. 15. The act of expelling air from the lungs.
  8. 16. The chest cavity that contians the lungs etc.
  9. 17. Gas we breathe in to sustain life.
  10. 18. A respiratory condition causing difficulty in breathing due to narrowed aiways and inflammaton.
  11. 22. A protein in red blood cells that binds to oxygen and transports it through the body.
  12. 23. The windpipe that connects the throat to the bronchi.
  13. 24. A state in which oxygen is exchanged for carbon dioxide.
Down
  1. 1. A flap of cartilage that prevents food from entering the windpipe.
  2. 2. Two branches that lead from the trachea to the lungs.
  3. 3. A thin membrane surrounding the lungs.
  4. 5. Small airways that lead to the alveoli.
  5. 6. The hollow space behind the nose.
  6. 8. The act of drawing air into the lungs.
  7. 11. The process of moving air in and out of the lungs.
  8. 12. Tiny air sacs where gas exchange occurs.
  9. 13. The voice box, located in the throat.
  10. 19. A passage through which air moves in and out.
  11. 20. The process of exchanging oxygen and carbon dioxide.
  12. 21. The throat; a passage for both food and air.