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Vasa Recta is the name given to blood vessels supplying the medullary region of the kidney. They are arranged in a U configuration but flow is opposite to that of the Loop of Henle. The blood vessels descend from the cortex down into the medulla. Its supplies the nutrients and oxygen the Loop of Henle needs.
Veins are the blood vessels that carry blood back to the heart. They may contain valves which stop blood flowing away from the heart. The heart works by following a sequence of electrical signals that cause the muscles in each chamber to contract in a certain order. blood vessel's main function is to transport blood around the body. Blood vessels also play a role in controlling your blood pressure. Blood vessels are found throughout the body. There are five main types of blood vessels: arteries, arterioles, capillaries, venules and veins.