The body...

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Across
  1. 3. percent of oxygen in the air the body USES
  2. 5. stops the heart in heart attack situations
  3. 6. wind pipe
  4. 8. universal donor of blood
  5. 11. most of the air is made of this element
  6. 13. pumps blood to the lungs
  7. 16. response by body to clear nasal cavities
  8. 17. red blood cells carry this to all cells
  9. 19. pressure in atriums
  10. 23. clear sticky substance as body protects itself
  11. 24. muscle responsible for breathing, hiccups
Down
  1. 1. color of oxygenated blood
  2. 2. happens when vomit gets into lungs, a person..
  3. 4. responsible for the sound of a heartbeat
  4. 7. give blood its red color
  5. 9. why runny nose, response by body
  6. 10. from cigarette smoke, does not allow O2
  7. 12. air sacs in lungs where O2 and CO2 exchange
  8. 14. percent of air that is oxygen
  9. 15. pumps blood to the whole body
  10. 16. area behind eyes to warm, moisten and filter air
  11. 18. redness and swelling in an area of damage
  12. 20. hair like structures that line airway
  13. 21. disease where it it hard to breathe out
  14. 22. condition of narrowing of airway, by exercise?