The respiratory system

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Across
  1. 2. amount of additional air breathed out after normal expiration
  2. 7. volume of air breathed out in one minute
  3. 8. oxygenated red blood cells
  4. 10. volume of air forced out of the lugs after maximal inspiration
  5. 12. voice box
  6. 13. hundreds of them in each lung
  7. 14. where gas exchange takes place
  8. 16. total lung capacity after inhaling deeply
  9. 18. dome shaped muscles
  10. 19. contains the heart and lungs
  11. 20. volume of air taken in as well as normal tidal volume
  12. 21. volume of air that remains in lungs after max. Inspiration
Down
  1. 1. c-shaped rings of cartilage creating a tube
  2. 3. draw ribs up and out and down and in
  3. 4. small flap of cartilage
  4. 5. connects nasal cavity to larynx and oesophagus
  5. 6. one type of gas is exchanged for another
  6. 9. breathing
  7. 11. nose hairs
  8. 13. subdivide until deep into the lungs
  9. 15. gas on one side and blood flowing past on the other
  10. 17. the volume of air breathed in and out per breath