EVERYDAY SCIENCE

Detailed explanation-1: -Muscular arteries contain more smooth muscle cells in the tunica media layer than the elastic arteries. Elastic arteries are those nearest the heart (aorta and pulmonary arteries) that contain much more elastic tissue in the tunica media than muscular arteries.

Detailed explanation-2: -Arteries have thick, elastic and muscular walls. Arteries are the first vessels that the heart pumps blood through, they experience the highest blood pressure, so they have thick elastic walls to withstand the high pressures. Veins have thin and non-elastic walls.

Detailed explanation-3: -Of the three types of vessels, arteries have the thickest tunica media (allowing stretch/recoil and vasoconstriction), veins have relatively thick tunica adventitia, and capillaries are the thinnest (allowing exchange of materials.) Blood pressure varies in different parts of the vascular system.