The blood vessels are one of the three major components of the circulatory system. It serves as a pathway for materials to reach their respective destinations.
There are three types of blood vessels: arteries, veins, and capillaries. The walls of arteries and veins share the same histological layers. The innermost layer is the tunica intima followed by the tunica media which consists of smooth muscles and elastic fibers. The outermost layer is the tunica adventitia or tunica externa.
The capillaries are the smallest of all the blood vessels. The walls are composed of a single layer of endothelial cells and a basement membrane.
There are three types of blood vessels: arteries, veins, and capillaries. The walls of arteries and veins share the same histological layers. The innermost layer is the tunica intima followed by the tunica media which consists of smooth muscles and elastic fibers. The outermost layer is the tunica adventitia or tunica externa.
The capillaries are the smallest of all the blood vessels. The walls are composed of a single layer of endothelial cells and a basement membrane.