MICROANATOMY

Detailed explanation-1: -The arteries branch into smaller and smaller vessels, eventually becoming very small vessels called arterioles. Arteries and arterioles have muscular walls that can adjust their diameter to increase or decrease blood flow to a particular part of the body.

Detailed explanation-2: -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-3: -Muscular arteries can be identified by the well-defined elastic lamina that lies between the tunicae intima and media. The splenic artery (lienal artery), the blood vessel that supplies oxygenated blood to the spleen, is an example of a muscular artery.

Detailed explanation-4: -2.1. The coronary artery wall consists of three layers. The inner layer is called intima, the middle layer is called media, and the outer one is denoted the adventitia.