Final answer:
Atherosclerosis is the hardening of the arteries due to plaque accumulation.
Step-by-step explanation:
The hardening of the arteries due to the accumulation of plaque is called atherosclerosis. Atherosclerosis occurs when cholesterol, fat, and other substances build up in the artery walls, forming plaques. Over time, these plaques can narrow or block the arteries, leading to decreased blood flow and potential complications such as heart attacks and strokes.
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