Which arteries are the major blood suppliers for the arm and hand?

The ulnar and radial arteries are indeed the primary blood suppliers for the arm and hand. The radial artery runs along the lateral aspect of the forearm to the wrist and hand, while the ulnar artery travels along the medial side. Both arteries branch off from the brachial artery, which is the main vessel supplying blood to the arm. The ulnar and radial arteries further divide into smaller branches in the hand, providing necessary blood flow to the muscles, skin, and tissues of the hand. This dual arterial supply ensures that both the ulnar and radial sides of the hand receive adequate circulation, which is crucial for function and health.

The other options presented do not directly relate to the blood supply of the arm and hand. The brachial artery, while important for supplying the arm, is not included in the correct answer as it is not as relevant for the specific blood supply to the hand itself. The subclavian and axillary arteries are critical for supplying blood to the upper limb as a whole but are more upstream and do not directly supply the hand. Furthermore, the femoral and popliteal arteries are related to the legs and have no relevance to the blood supply of the arm and hand.