respiratory system

12345678910
Across
  1. 3. Oxygen's "taxi"
  2. 6. process of changing gases between the atmosphere and body cells
  3. 7. hemoglobin has _ binding sites
  4. 9. exchange of gases between the atmosphere and body cells
Down
  1. 1. true or false: its hard for oxygen to at first bind to hemoglobin
  2. 2. exchange of gases between blood and body cells
  3. 4. percentage of Oxygen in the air
  4. 5. this is just as important as Oxygen is in the body
  5. 8. blood entering the lungs is Oxygen-____
  6. 10. blood leaving the lungs is Oxygen-____