PATHOLOGY

Detailed explanation-1: -Therefore, size is not their main identifying feature, but rather the structural makeup of smooth muscle in their wall-the wall of arterioles composed of three structurally distinct layers: intima, media, and adventitia .

Detailed explanation-2: -The wall of an artery consists of three layers. The innermost layer, the tunica intima (also called tunica interna), is simple squamous epithelium surrounded by a connective tissue basement membrane with elastic fibers. The middle layer, the tunica media, is primarily smooth muscle and is usually the thickest layer.

Detailed explanation-3: -The adventitia or outer layer which provides structural support and shape to the vessel. The tunica media or a middle layer composed of elastic and muscular tissue which regulates the internal diameter of the vessel. More items