The radial artery ends at which structure?

The radial artery is a major blood vessel that supplies blood to parts of the forearm and hand. It travels down the arm and primarily supplies the lateral aspect of the forearm.

The correct answer is that the radial artery ends at the deep palmar arch. The deep palmar arch is formed primarily by the radial artery and provides blood supply to the deeper structures of the hand, including the thumb and index finger. This arch is vital for ensuring that the hand and fingers receive an adequate blood flow for optimal function.

The superficial palmar arch, while also related to the radial artery, is primarily formed by the ulnar artery and provides blood supply to the superficial structures of the hand, such as the pads of the fingers. The palmaris brevis muscle is a small muscle in the ulnar aspect of the palm, and while it is near the arterial supply paths, it is not an endpoint of the radial artery. The carpal tunnel is a passageway in the wrist that contains tendons and the median nerve but does not relate directly to the termination of the radial artery.