Vein and artery walls are divided into three layers, which are the middle media, the outer adventitia, and the inner intima. The intima layer of the blood vessels is made up-of the endothelial cells. It forms an endothelial lining, below which lies the connective tissue layer. The thickness of these layers varies in arteries and veins.

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Chapter 22, Problem 13RFT

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Vein and artery walls are divided into three layers, which are the middle media, the outer adventitia, and the inner intima. The intima layer of the blood vessels is made up-of the endothelial cells. It forms an endothelial lining, below which lies the connective tissue layer. The thickness of these layers varies in arteries and veins.

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