Final answer:
The ulnar artery is formed at the bifurcation of the brachial artery and supplies blood to the lower arm and carpal region.
Step-by-step explanation:
The ulnar artery is formed at the bifurcation of the brachial artery and parallels the ulna. It gives off smaller branches until it reaches the carpal region where it fuses with the radial artery to form the superficial and deep palmar arches. The ulnar artery supplies blood to the lower arm and carpal region.