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What is the venous system

The venous system is the part of the circulatory system made up of a network of veins that have the distinctive function to return blood back to the heart for re-oxygenating and refueling. The main venous systems, the superficial and the deep, are connected by perforating veins.

superficial veins

The superficial veins are visible just below the surface of the skin. The longest and largest of these veins, called the great saphenous vein, is connected to the femoral vein and courses down the medial (inner) aspect of the thigh and leg. The smaller saphenous vein begins behind the knee and runs down the posterior (back) of the calf. Like the great saphenous, it has branches that extend under the skin in several directions.

Deep veins

The greatest percentage of blood from deep veins are veins that run deep inside your leg muscles. These veins carry the greatest of blood from your legs to your heart.

perforating veins

Perforating veins connect the superficial veins and the deep veins. Because the blood flows faster through the deep veins, the blood in the superficial veins is pulled and emptied into the deep veins.

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