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Leg Vein Valve

6,984 بازدیدها· 01/17/24
samer kareem
samer kareem
6 مشترکین
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که در

The deep veins play a significant role in propelling blood toward the heart. The one-way valves in deep veins prevent blood from flowing backward, and the muscles surrounding the deep veins compress them, helping force the blood toward the heart, just as squeezing a toothpaste tube ejects toothpaste.

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