The document summarizes the venous system of the lower extremity. It describes the deep and superficial venous networks. The deep system includes the popliteal vein, femoral vein, and gluteal veins. It collects blood from the deep veins of the foot and leg, traveling proximally to the femoral vein. The superficial system includes the small and great saphenous veins which collect blood from the surface of the foot and leg, draining into the deep system at the femoral vein.