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◦ Describe the three layers (tunics) found in all named (i.e. large) blood vessels. Compare and...

◦ Describe the three layers (tunics) found in all named (i.e. large) blood vessels. Compare and contrast these tunics in arteries to the same tunics in veins.

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Answer #1

The three layers in the blood vessels are from inner to outer layer

Tunica intima

Tunica media

Tunica external / adventitia

The tunica intima in arteries consists of elongated endothelial cells where as in veins it consists of flat endothelial cells

The tunica media in the arteries are made upof strong smooth muscle cells and elastic fibers whereas in the veins it has less smooth muscle cells and almost no elastic fibers

The tunica externa in the arteries are less developed wheras in the veins it is well developed.

Hope this helps.... Thank you!!!

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