Venous Stasis Rash Anatomy
To better understand stasis dermatitis, it helps to understand the anatomy of the veins.
Veins are thin-walled vessels that carry blood from the tissues. Veins normally permit the flow of blood in one direction: back toward the heart. Tiny valves inside the veins prevent blood flow from reversing direction. The valves are especially important in the legs, in order to overcome the effects of gravity. Leg muscle contractions squeeze blood out of veins, which also helps to pump blood back toward the heart.
There are many deep and superficial (close to the skin) veins in the body. The saphenous vein in the leg is one of the largest superficial veins.
- Saphenous vein
- Varicose veins
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