Answer:
great saphenous vein
Step-by-step explanation:
Great saphenous vein , GSV is subcutaneous, large, superficial vein of leg. GSV is the longest vein in body which runs along length of lower limb, returning the blood from foot, leg and also at femoral triangle, thigh to deep femoral vein.
Great saphenous vein runs through subcutaneous tissue layer to dermis and superficial to skeletal muscles of foot and leg.