👉 In anatomy, "veins" refer to blood vessels that carry deoxygenated blood from the body's tissues back to the heart. The term "vein" can be misleading because it is not always thin and delicate like arteries; some veins are thick and can be easily visible beneath the skin. The buyer veins are small, thin-walled veins that lie immediately beneath the skin near the surface of the muscles or organs, often appearing as blue or purple lines. These veins are usually close to the skin's surface and are involved in returning blood to the venous system after it has been filtered through the tissues.
