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Q. Are the veins or the arteries constituted of more muscle tissue? How different are the walls of these two kinds of blood vessels?
The arterial system has thicker muscle walls since within arteries the blood circulates under higher pressure the veins are more flaccid than arteries.
From the lumen to the external layer both types of vessels are made of connective tissue, endothelium and muscle tissue. In both the endothelium is a single layer of cells in arteries the muscle tissue portion is thicker than in veins and in these vessels the external connective tissue is thicker than in arteries. Arteries are the pulsating blood vessels the arterial pulse can be felt in a medical examination, for instance, by the palpation of the radial artery in the internal and lateral face of the wrist near the base of the thumb.
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