Tim Taylor is a senior writer at Innerbody Research focusing on human anatomy and physiology. Tim earned both his Bachelor of Science degree in Biology and his Master's degree in Teaching from the University of Pittsburgh.

Last updated: May 5th, 2025

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The tunica media of the artery is the middle layer of cells. In the arteries, it contains an extra layer of smooth muscle that allows for increasing or decreasing the size of the artery.

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