| Oxygen
in the body |
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| • | PIO2- inspired oxygen- oxygen available in the |
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| lungs |
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| • | O2 transported in body by respiratory pigment |
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| haemoglobin
in red blood cells |
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| – | Lungs
oxygenate blood |
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| – | Heart
pumps blood through body |
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| – | High pressure of O2 in capillaries causes diffusion into |
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| tissue |
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| • | Sea-level- 100 ml of blood contains 20 ml of O2 |
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