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Uploaded by dizzo95 on Aug 3, 2007
The Exchange of GasesAs air is breathed into the lungs, exchange of gases takes place at the highly folded, moist surface of air sacs. These are richly supplied with blood capillaries, which take up oxygen and give up carbon dioxide.
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Too short but good info
TheKanadianCid 1 year ago
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Too short but good info
TheKanadianCid 1 year ago