True about the anatomy of great saphenous vein-
High-Yield Explanation
Great saphenous vein forms as continuation of medial marginal vein to which dorsal venous arch unites. It runs in front of medial malleolus and opens into femoral vein through the saphenous opening located at 4cms below and lateral to pubic tubercle. There are about 15-20 valves in the great saphenous vein.