Superficial veins are not paired with an artery, unlike the deep veins, which are typically associated with an artery of the same name.

Superficial veins are important physiologically for cooling of the body.

Superficial veins are often visible underneath the skin.

Those below the level of the heart tend to bulge out, which can be readily witnessed in the hand, where the veins bulge significantly less after the arm has been raised above the head for a short time.

Veins become more visually prominent when lifting heavy weight, especially after a period of proper strength training.