CNRI / SCIENCE PHOTO LIBRARY CNRI / SCIENCE PHOTO LIBRARY
Atherosclerosis and blood clot, light micrograph. Atherosclerotic coronary artery and thrombus. The extensive fatty deposit (brown) on the artery wall has narrowed the lumen (internal space), aiding the formation of the blood clot (thrombus, red). If the coronary artery becomes completely blocked, this can lead to a fatal heart attack.
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