NEET BIOLOGY

Detailed explanation-1: -The tunica media is the middle layer composed of smooth muscle fibers. It is much thicker in arteries than in veins because arteries are actively vasoconstricting or vasodilating. This helps the body to regulate blood flow into an area and blood pressure.

Detailed explanation-2: -In addition, the tunica media is much thicker in arteries than in veins. As a result, arteries seem to have a more uniform shape-they tend to be more circular in shape than veins.

Detailed explanation-3: -Tunica interna: The inner layer and composed of elastic membrane and endothelium. The middle layer i.e. Tunica media is thin in veins and thick in arteries.

Detailed explanation-4: -The middle layer ( tunica media ) is thicker and contains more contractile tissue in arteries than in veins.

Detailed explanation-5: -Capillaries. Capillaries are tiny, extremely thin-walled vessels that act as a bridge between arteries (which carry blood away from the heart) and veins (which carry blood back to the heart).