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There are two types of blood vessels in the circulatory system of the body: arteries that carry oxygenated blood from the heart to various parts of the body and veins that carry blood towards the heart for purification.hey are tiny branches of arteries that lead to capillaries and help maintain the pressure and blood flow in the body. Venous valves prevent blood from flowing in the opposite direction. Connective tissues make up the outermost layer of a vein which is also known as-tunica adventitia or tunica externa.
Veins, arteries, and capillaries are the 3 types of blood vessels. Arteries are the type of blood vessel that carries oxygenated blood from the lungs and heart out to the different parts of the body.From there, the capillaries take the oxygenated blood very close to where the blood is supposed to go.The red blood cells then pass the oxygen to the part of the body.The blood cells then go into the veins, which carry the blood back to the heart and lungs to be re-oxygenated. Basically, arteries carry blood from the heart, then the veins carry it back.he red blood cells then pass the oxygen to the part of the body. The blood cells then go into the veins, which carry the blood back to the heart and lungs to be re-oxygenated. Basically, arteries carry blood from the heart, then the veins carry it back.