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MODEL PAPER 7 — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYMODEL PAPER 73 Marks
Question
What is meant by coronary artery disease?
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Answer

It is the hardening of arteries and arterioles due to the thickening of the fibres tissue and the consequent loss of elasticity. It is often referred to as atherosclerosis. This mainly affects the vessels, which are mainly responsible for supplying blood to the heart muscle. It seems to occur due to deposition of calcium, fat cholesterol, and fibrous tissues, making the lumen of arteries narrower

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