Final answer:
Visible vessels on the dorsal surface of the hand are superficial veins like the cephalic vein, which drain the hand and lead to larger veins.
Step-by-step explanation:
The vessels that can easily be seen on the dorsal surface of the hand are primarily veins, not arteries. The superficial veins such as the cephalic vein and the dorsal venous network are visible through the skin. These veins are significant because they drain the hand and digits and lead to the radial vein, ulnar veins, and the median antebrachial vein.
The superficial palmar arch formed by these veins is also pivotal as it supplies blood to the digits.