How can the heart be strong enough to pump blood up your legs against gravity?
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Veins must work against gravity to return blood the heart. The muscles of the leg help that process, and valves within the veins usually keep the moving blood from flowing back down toward the feet.⭐⭐⭐⭐⭐⭐⭐
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Because of the valves, the blood can only move in one direction as it gets squeezed along. So it is a combination of blood pressure from the heart's pumping action, the valves, and muscle movement that gets the blood up the legs against gravity.
By llMrIndiall ❤
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