MICROANATOMY

Detailed explanation-1: -An arteriole is a very small artery that leads to a capillary. Arterioles have the same three tunics as the larger vessels, but the thickness of each is greatly diminished. The critical endothelial lining of the tunica intima is intact.

Detailed explanation-2: -They’re strong, have relatively thick walls, and contain a high percentage of smooth muscle, which means they’re not under voluntary control. As the most highly regulated blood vessels in the body, arterioles also have the distinction of contributing the most to the rise and fall of blood pressure.

Detailed explanation-3: -Blood is pumped from the ventricles into large elastic arteries that branch repeatedly into smaller and smaller arteries until the branching results in microscopic arteries called arterioles.