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Artery
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Vein
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An artery is a vessel which carries blood away from the heart towards any organ.
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A vein is a vessel which conveys the blood away from an organ towards the heart.
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Artery has thick muscular walls.
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Vein has thin muscular walls.
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It has narrow lumen.
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It has a broad lumen.
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There are no valves.
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Thin pocket-shaped valves are present in the veins.
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Arteries progressively decrease in size and branch to form arterioles. Arterioles further breaks up to form capillaries.
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Capillaries unite to form branches called Venules. Venules further unite to form veins.
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