Arteries Vs Veins

Dissimilarities between Arteries and Veins


Arteries and Veins are both blood vessels important in transporting Oxygen and other substances towards the different parts of the body and back to the heart. Arteries carry oxygenated blood from the heart up to the extremities except for the pulmonary and umbilical arteries. Arteries are then classified into two: Systemic arteries and Pulmonary arteries.  They have a thick elastic muscle layer that can handle the high pressure of blood directly coming from the heart. Hence, they are termed as high-pressure vessels and resistance vessels. Moreover, they have rigid walls and no valves. The thickest layer in arteries is Tunica media and they are typically located in the deep parts of the body. Diseases associated with arteries include artherogenesis leading to myocardial ischemia.

Veins on the other hand carry deoxygenated blood from the different parts of the body towards the heart except for the pulmonary vein and umbilical vein. They are classified as superficial, deep, pulmonary, and systemic veins. They have a thin elastic layer with semilunar valves that prevent the backflow of the blood. The thickest layer in veins is Tunica adventitia. Additionally, they have collapsible walls and their location is near the skin. Diseases associated with veins include deep vein thrombosis.


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