Tunica intimae is the inner coat and it consists of tissue 2)subendothelial layer: a layer sa, I)inner endothelial layer of loose connective tissue venule internal elastic membrane duct (often very distinct) connective tissue This layer is relatively constant within different size arteries
Tunica intimae • is the inner coat and it consists of 1)inner endothelial layer 2)subendothelial layer: a layer of loose connective tissue 3)internal elastic membrane (often very distinct) • This layer is relatively constant within different size arteries
Tunica media This layer makes up the greatest part of the wall of the artery It is comprised primarily of smooth muscle. n small arteries or arterioles it may be only 1-3 cells thick but in larger arteries may comprise hundreds of layers of muscle cells In large arteries there in increased amounts of elastin fibers nal elastic
Tunica media • This layer makes up the greatest part of the wall of the artery. • It is comprised primarily of smooth muscle. • In small arteries or arterioles it may be only 1-3 cells thick but in larger arteries may comprise hundreds of layers of muscle cells. • In large arteries, there in increased amounts of elastin fibers
Tunica adventitia This is the outer layer of the wall of the artery It consists primarily of connective tissue and serves to attach the blood vessel into the surrounding connective tissue Often contains adipose tissue and often contains blood vessels(vasa vasorum) that supply the walls of the blood vessels imedia /a lumen elastic fibers
Tunica adventitia • This is the outer layer of the wall of the artery. • It consists primarily of connective tissue and serves to attach the blood vessel into the surrounding connective tissue. • Often contains adipose tissue and often contains blood vessels (vasa vasorum) that supply the walls of the blood vessels
Medium-Sized artery (Muscular artery) muscular artery: diameter larger than Imm Endothelium Tunica intima Subendothelial layer: LCT Internal elastic lamina: clear Tunica media: contain 10-40 layers of circular smooth muscle External elastic lamina Tunica adventitia LCT contain vasa vasorum
Medium-sized artery (Muscular artery): ▪ muscular artery: diameter larger than 1mm Tunica intima Endothelium Subendothelial layer: LCT Internal elastic lamina: clear Tunica media: contain 10~40 layers of circular smooth muscle Tunica adventitia External elastic lamina LCT: contain vasa vasorum
Medium-sized artery unica Adventitia unca Media unica intima
Tunica Adventitia Tunica Media Tunica intima Medium-sized artery