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ICSE Question Bank
2020Q2(b)(ii)The Circulatory System
Short answerModerate1 mark
2(b)

The diagram given below represents the simplified pathway of the circulation of blood. Answer the questions that follow: The diagram given below represents the simplified pathway of the circulation of blood. Answer the questions that follow:

Figure for this question

Which blood vessel supplies oxygenated blood to the muscles of the heart?

Topic: Coronary artery

Previous-year question practice database

Answer

Exam answer

The CORONARY ARTERY.

Explanation

The heart is a muscle and needs its own blood supply. The blood passing THROUGH its chambers does not nourish the heart wall — it is merely in transit — so the coronary arteries branch from the base of the aorta to supply the cardiac muscle itself.

WHY IT MATTERS: blockage of a coronary artery starves part of the heart muscle of oxygen, and that muscle dies. This is a HEART ATTACK (myocardial infarction), and it is why the coronary arteries are named so often in medicine.

The word CORONARY means "crown", from the way these vessels encircle the heart.

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