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What causes veins to appear close to surface. why do bruise marks appear for unkown reasons?

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2014-04-22 17:27:30
2014-04-22 17:27:30

Superficial vein is a term used to describe a vein that is close to the surface of the body. It is used to differentiate veins that are close to the surface from veins that are far from the surface, known as deep veins.

Superficial veins are important physiologically for cooling of the body. When the body is too hot the body shunts blood from the deep veins to the superficial veins, to facilitate heat transfer to the surroundings. Superficial veins can be seen under the skin.

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