True about the anatomy of great saphenous vein:
A i.e. Stas as continuation- of medial marginal vein
Stas as a continuation of medial marginal vein
Ends of femoral vein 2.5 cm below the inguinal ligament
There are 2 - 5 valves below the knee.
Ascends 2.5 - 3 cm behind tibial malleolus