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Great Saphenous Vein. This vein is a conjunction of the dorsal vein of the great toe and the dorsal venous arch of the foot. It travels up the leg, in front of the inner ankle protruberance (anterior to the medial malleolus), and ascends all the way up the lower limb on the inner aspect leg and thigh (anteromedial aspect).
The femoral vein runs up through the middle of both your legs, connects through at the crease of your leg and groin, and then continues up on either side of your torso area until it merges into the other larger veins leading to the heart. (So, keep in mind that there are two of these veins, one on either side of your groin area.)