Veins of the lower limb
You will remember from your anatomy classes that there are several different types of veins - deep, superficial and perforating veins. Remember that deep veins are those which accompany the arteries. Within the popliteal region and in the lower leg, these deep veins course in pairs known as venae comitantes and are generally named according to the artery they accompany.
Within the thigh and leg, there are two major superficial veins which you ought to be familiar with - the great saphenous vein and the small saphenous vein. Within the foot, you should be familiar with the dorsal venous arch, which is formed by the union of the four dorsal metatarsal veins. You should also be familiar with the plantar cutaneous arch, which is continuous with the medial and lateral marginal veins. The great saphenous is a continuation of the medial marginal vein of the foot. It ascends up the leg around 2-3 cm anterior to the medial malleolus, it passes through the medial leg and thigh before draining into the femoral nerve. Note that the great saphenous vein shares a common course with the saphenous nerve.