PATHOLOGY

Detailed explanation-1: -tunica adventitia-The outermost layer is composed largely of collagen. In arteries, the elastic fibers form a distinct layer between the tunica adventitia and tunica media known as the external elastic lamina.

Detailed explanation-2: -arteries. The tunica media, or middle coat, is made up principally of smooth (involuntary) muscle cells and elastic fibres arranged in roughly spiral layers. The outermost coat, or tunica adventitia, is a tough layer consisting mainly of collagen fibres that act as a supportive element.

Detailed explanation-3: -Tunica adventitia or tunica externa is the outer layer of the blood vessel wall. It consists of connective tissue with vasa and nervi vasorum and plays a key role in vascular health. The aim of our study was to compare the wall layers beyond tunica media in arteries of different type and location.