NORMAL ARTERIAL WALL.

the arterial system of the human Body is divided into systemic arteries carrying blood from the heart to the whole body, and pulmonary arteries , carrying deoxygenated blood ( Co2 ) From the heart to lungs. The outer most layer of an Artery ( Or vein ) is known as the tunica externa, also Known as tunica adventitia ,and is composed of Collagen fibres and fibres elastic tissue with the largest arteries containing vasa vasorum ( small blood vessel that supply Large blood vessel ). Most of the layers have a clear boundary between them, however the tunica externa has a boundary that is ill-defined , normally it's boundary is considered when it meets or, towards the connective tissue , inside this layer is the tunica media , or mediais made up off Stomach . Xx

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Well reviewed anatomical arterial structure Yes very important while doing arterial anastomosis You need to understand it is intima which attracts platelets and fibrin wherever it is damaged and forms plaques which are responsible for blokades and embolism As age advances it is loss of elasticity of tunica externa and thus helps in atherosclerosis thus leading in hypertension specifically ISHT

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Nice sketchy representation

Thank you doctor
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