Tuesday 18 August 2015
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| your lungs contain tiny blood vessels called capillaries, the lung capillaries there are 300 million, that if we take all these capillaries, and we expand it from end to end, it will produce a length of 1500 miles. |
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| your lungs contain tiny blood vessels called capillaries, the lung capillaries there are 300 million, that if we take all these capillaries, and we expand it from end to end, it will produce a length of 1500 miles. |
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