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The walls of arteries are generally very thick. In fact, artery walls consist of three cell layers
Innermost layer- smooth; made up of epithelial cells; Middle layer- muscle tissue; Outer wall- flexible connective tissue
microscopic blood vessel that connects arteries and veins; has walls one cell thick, through which nutrients and oxygen diffuse into body cells, and waste materials and carbon dioxide diffuse out of body cells
veins also have three layers: a thin outer layer, a middle layer and a smooth inner layer; veins are less muscular than arteries and have less elasticity
Tunica Interna, can not contract, squamus tissue that lines the walls of the heart, blood vessels, and lymphatic vessels, simple squamous epithelia in body which reflects its location. Provides a slick, friction - reducing lining inthe cardiovascular system
Internal Elastic Larmina
A discrete layer only in medium-sized areries, assists in maintaing blood oressure
Artery Smooth Muscle
Tunica Media,in the artery these vasoconstrict (smaller vessel diameter) or vasodilate (increase vessel diameter) to specifically direct additional blood flow to certain locations as needed
External Elastic Lamina
A layer of elastic CT lying immediately outside the smooth muscle of the tunica media of an artery, separates the tunica media and the tunica adventitis (externa) in larger arteries
Artery Fibrous Tussue
Fibrous tissue contiguos with the fascisl layer in which the artery is located
Tunica Interna, can not contract, squamus tissue that lines the walls of the blood vessels, simple squamous epithelia in body which reflects its location. Provides a slick, friction - reducing lining in the veins
Vein Smooth Muscle
Tunica Media,in the vains these vasoconstrict (decrease vessel diameter) or vasodilate (increase vessel diameter) to specifically direct additional blood flow to certain locations as needed
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