What veins constitute the superficial veins of the lower extremity, and where do they drain into the deep system?

The greater and lesser saphenous veins.
The greater saphenous vein (medial) drains into the femoral vein.
Perforating veins connect the greater saphenous vein to the deep venous system throughout its course in the leg.
The lesser saphenous vein drains to the deep system at the popliteal vein.