The Smallest Arterial Branches are Called The

Question

The smallest arterial branches are called the
A) muscular arteries.
B) arterioles.
C) capillaries.
D) venules.
E) veins.

Accepted Answer

Arterioles are the smallest arterial branches, with diameters ranging from 10 to 100 micrometers. They lead to capillary beds, where exchange of gases, nutrients, and wastes occurs. Muscular arteries are larger and have more smooth muscle in their walls, while capillaries are even smaller and have thin walls that allow for diffusion of substances. Venules and veins are part of the venous system and carry blood back to the heart.