ANIMATED HEALTHCARE LTD / SCIENCE PHOTO LIBRARY ANIMATED HEALTHCARE LTD / SCIENCE PHOTO LIBRARY
Narrowed artery. Computer artwork of an artery affected by atherosclerosis, showing red blood cells (red). Atherosclerosis is narrowing of the arteries (stenosis) due to fatty deposits (yellow) on its inner walls. The deposits are made of atheroma, a substance comprising cholesterol, decaying cells, blood cells and fatty proteins. Narrowing of blood vessels raises blood pressure, which puts strain on the heart. Atherosclerosis is the main cause of heart attacks.
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