03-08-07, Anatomy and Physiology Cardiovascular review

The capillaries make up nets that diffuse the blood cells throughout the body. Capillaries have one small lining layer while arteries and veins have three muscle layers. The walls of arteries are going to be thicker. The internal artery lining is smooth muscle and is going to be thicker than the vein's internal lining. Veins have the additional component that arteries do not have - veins have valves. Veins have skeletal muscle outside of them that helps to push the blood along back up towards the heart as well. Capillaries have simple squamous epithelial tissue - this is because it helps them to rapidly diffuse gases and nutrients to the cells nearby.

Actually, the internal lining of the artery is endothelial tissue, and the middle layer of arteries is smooth muscle, and the outside lining is going to be connective tissue.