Superficial vein

Superficial Vein

Diagram of the superficial veins of the upper body, from Gray's Anatomy.

The superficial vein is a type of vein that is close to the surface of the body. Unlike deep veins, which are typically located within muscle tissue, superficial veins are not. They play a crucial role in blood circulation, carrying deoxygenated blood back to the heart.

Structure

Superficial veins are located between the skin and the fascia, a layer of connective tissue that surrounds muscles and other organs. They are easily visible through the skin, especially in areas with less subcutaneous fat, such as the hands and feet.

Function

The primary function of superficial veins is to transport blood from the body's tissues back to the heart. They connect with deep veins through perforator veins, which have one-way valves to prevent backflow of blood.

Clinical significance

Superficial veins are often used for venipuncture (blood draw), intravenous therapy, and the insertion of peripheral venous catheters. They are also the veins most likely to develop varicose veins and venous insufficiency.

See also

• Deep vein
• Perforator vein
• Venous system
• Varicose veins