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What do the veins have that prevents blood from flowing away from the heart? |
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All veins, with the exception of those in the head and face, have one-way valves which prevent blood from flowing away from the heart, and helps prevent blood from pooling in dependent areas.
First answer by DeLaughterDO. Last edit by DeLaughterDO. Contributor trust: 55 [recommend contributor]. Question popularity: 1 [recommend question]
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