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Cardiovascular Sytem (Major veins (External jugular vein, Femoral vein,…
Cardiovascular Sytem
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Blood Vessel Types
Veins
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The outer layer is called tunica adventitia or tunica externa, the middle layer of smooth muscle called the tunica media, and the inner layer lined with endothelial cells called the tunica intima
Arteriole
Arterioles have the same three tunics as the larger vessels, but the thickness of each is greatly diminished.
Arterioles distribute blood to capillary beds, the sites of exchange with the body tissues
Arteries
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All arteries have relatively thick walls that can withstand the high pressure of blood ejected from the heart
Capillary
The wall of a capillary consists of the endothelial layer surrounded by a basement membrane with occasional smooth muscle fibers
Capillaries lead back to small vessels known as venules that flow into the larger veins and eventually back to the heart
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Heart Anatomy
Valves
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Pulmonary valve. The pulmonary valve is located between the right ventricle and the pulmonary artery.
Mitral valve. This valve is located between the left atrium and the left ventricle. It has only 2 leaflets.
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