Where does the great saphenous vein (GSV) originate?

The great saphenous vein (GSV) originates in the foot. More specifically, it starts as a continuation of the dorsal vein of the great toe and travels up the medial aspect of the leg and thigh, eventually draining into the femoral vein in the groin area. Its primary function is to collect deoxygenated blood from the lower limb and support venous return to the heart. Understanding its origin is crucial for various clinical practices, including the recognition of conditions affecting venous drainage and potential interventions.