Homeostasisa Intima Research Paper

The veins have same three walls of layers as the arteries. The outer layer of the vein is called tunica adventitia it contain a connective tissue, collagen, and elastic fibres. The second layer of the vein is tunica media there is less smooth muscle comparing to the connective tissue. Comparing to the arteries the vein has less pressure which means the wall are thinner this allows to hold the blood more. Lastly, tunica intima is an inner layer it contains valves this allow the blood to flow in a single direction.