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breathing mechanisms

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Across:
3. The MAXIMUM amount of oxygen the body is able to use in one minute.
5. The type of "exchange" which takes place when blood moves between the lungs and the blood vessels.
6. Technical word for "Breathing In"
7. The total amount of air the lungs can hold
8. Technical word for "Breathing Out"
10. Haemaglobin carries oxygen - these contain haemaglobin

Down:
1. Breathed out in quantities of approximately 4%
2. The volume of OXYGEN the body actually uses in one minute (not just how much air is breathed in)
4. Breathed in in quantities of about 21% and breathed out in quantities of 16% - more of this is needed by the muscles when exercising.
9. The VOLUME of air breathed in and out in one breathing cycle