Final answer:
The ulnar artery supplies the superficial palmar arch, while the radial artery supplies the deep palmar arch.
Step-by-step explanation:
The blood supply to the hand is facilitated by two interconnected arterial arches: the superficial palmar arch and the deep palmar arch. The superficial palmar arch is primarily supplied by the ulnar artery.
The ulnar artery, originating from the brachial artery in the arm, courses down the forearm and enters the hand. As it reaches the palm, the ulnar artery gives rise to various branches, ultimately forming the superficial palmar arch. This arch is located closer to the surface of the palm and is a key contributor to the blood supply of the hand.
Conversely, the deep palmar arch is predominantly supplied by the radial artery. The radial artery, another major branch of the brachial artery, follows a course down the forearm and enters the hand. As it reaches the palm, the radial artery gives rise to branches that contribute to the formation of the deep palmar arch.
The deep palmar arch is situated deeper within the hand, running parallel to the superficial palmar arch. Together, these arches create a rich vascular network, ensuring a robust blood supply to the structures of the hand.
In summary, the ulnar artery supplies the superficial palmar arch, while the radial artery supplies the deep palmar arch. This dual arterial supply is crucial for providing the intricate vascular network necessary for the complex functions of the hand.