Across
- 6. A small percentage of oxygen floats around in the.
- 9. Makes up 21% of the respiratory system.
- 10. The exchange of gases between the blood and alveolar air.
Down
- 1. Tells how many oxygen molecules there are.
- 2. How hemoglobin knows when to collect cargo and when to let it go.
- 3. The movement of oxygen from an area of high pressure to an area of low pressure.
- 4. Also diffuse from areas of high concentration to areas of low concentration.
- 5. Rich in oxygen.
- 7. The drop in CO2 that occurs in the blood when you hyperventilate.
- 8. Acts as a "oxygen sponge".