Great saphenous vein

Blood vessels · Latin: Vena saphena magna

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The great saphenous vein (GSV, alternately "long saphenous vein";) is a large, subcutaneous, superficial vein of the leg.

It is the longest vein in the body, running along the length of the lower limb, returning blood from the foot, leg and thigh to the deep femoral vein at the femoral triangle.

Definition from Wikipedia, CC BY-SA 4.0.