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2015-07-19T16:16:32+05:30

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In veins, because there is no pressure, blood has to be able to flow back fairly rapidly to be used again. Because of this, veins have larger lumens to allow blood to pass more quickly when not under pressure.

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2015-07-19T19:18:38+05:30

In veins, because there is no pressure, blood has to be able to flow back fairly rapidly to be used again. Because of this, veins have larger lumens to allow blood to pass more quickly when not under pressure.


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