Final answer:
Atherosclerosis is a condition where plaque builds up in the arteries, causing them to narrow and impeding blood flow. This can lead to heart attacks or ischemic strokes.
Step-by-step explanation:
A condition that develops when a substance called plaque builds up in the walls of the arteries is known as atherosclerosis. This buildup narrows the arteries, making it harder for blood to flow through. It can lead to serious complications such as heart attack or ischemic stroke.
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