Describe the Structure of an Artery
All arteries have relatively thick walls that can withstand the high pressure of blood ejected from the heart. Tunica externa or tunica adventitia. Pin On Cambridge ------- carry high pressure blood away from the heart. . So the artery is red while the vein has a blue color. The structure and function of the heart arteries veins and capillaries is vital for the circulatory system to work. Blood is carried through three different types of blood vessels in the body. Each artery no matter what its size has walls with three layers or coats. And remember I said that the artery helps to transport oxygenated blood. Veins carry----------- blood back to the heart. The middle layer tunica media is thicker and contains more contractile tissue in arteries than in veins. And as a result its color is blue. Because of that the artery has a red color. The overall function of the circulatory system is to t...