The blood supply of the leg is transported by arteries and veins. The arteries carry blood from the heart to the limbs; veins carry blood back to the heart. The leg contains superficial veins, which are close to the surface and deep veins, which lie much deeper in the leg. Deep Vein thrombosis is a condition in which a blood clot forms in a deep vein. While these clots most commonly occur in the veins of the leg, they can also develop in other parts of the body.
