What is the major artery supplying the leg?

The major artery supplying the leg is the femoral artery. This artery is a continuation of the external iliac artery and is responsible for delivering oxygenated blood to the thigh and, through its branches, to the lower leg and foot. The femoral artery travels down the thigh where it eventually branches off into the popliteal artery, which further supplies blood to the knee and lower leg regions.

In the context of other options, the radial artery primarily supplies blood to the forearm and hand, while the subclavian artery is responsible for blood flow to the upper extremities and part of the neck. The aorta, while being the largest artery in the body and the main conduit for blood leaving the heart, does not directly supply the leg but rather gives rise to arteries that will. Therefore, the femoral artery is specifically designated for supplying the lower extremities, making it the correct choice in this context.