the lumen size is bigger in vein when compared with artery why
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Arterial walls are thicker to cope with the high pressure as it is easier for a thin-walled vessel to rupture than a thick-walled vessel. When under pressure from the heart, blood will exert a great pressure on the walls, so they will have to handle it.
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.
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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The Lumen size is bigger in vein when compared with artery
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