APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -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-2: -The tunica intima (New Latin “inner coat"), or intima for short, is the innermost tunica (layer) of an artery or vein. It is made up of one layer of endothelial cells and is supported by an internal elastic lamina. The endothelial cells are in direct contact with the blood flow.

Detailed explanation-3: -The tunica intima is the innermost layer of arteries and veins and represents a tissue layer found in all parts of the circulatory system. In the capillaries, the tunica intima is also responsible for the exchange of gases and nutrients between the blood and surrounding tissues.

Detailed explanation-4: -The tunica externa (New Latin “outer coat"), also known as the tunica adventitia (New Latin “additional coat"), is the outermost tunica (layer) of a blood vessel, surrounding the tunica media. It is mainly composed of collagen and, in arteries, is supported by external elastic lamina.