SOUTHERN ILLINOIS UNIVERSITY / SCIENCE PHOTO LIBRARY SOUTHERN ILLINOIS UNIVERSITY / SCIENCE PHOTO LIBRARY
Aorta of a 26 year old with atherosclerotic change. Atherosclerosis is the thickening and hardening of the arterial wall due to a buildup of plaque in the artery. As the artery walls thicken, blood flow is reduced and the arteries may eventually become blocked.
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