Contraction of skeletal muscles is necessary to push blood a


Veins have "one-way" valves that allow blood to flow in the heart-ward direction but not back. Contraction of skeletal muscles is necessary to push blood along. Velocity of blood is slowest in the capillaries: maximize exchange of nutrients and wastes. If blood pressure is so low in the veins why does the blood flow increase?

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Biology: Contraction of skeletal muscles is necessary to push blood a
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