The muscle of the heart itself is supplied with blood by the
Correct answer: B. coronary arteries
- A. pulmonary arteries
- B. coronary arteries
- C. blood passing through the chambers
- D. superior vena cava
Explanation
The coronary arteries branch from the base of the aorta and spread over the heart wall, because the myocardium is far too thick for the blood inside the chambers to supply it by diffusion. Blockage of one of these arteries starves a part of the muscle of oxygen and causes a heart attack. The pulmonary arteries carry deoxygenated blood away to the lungs.
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About Human Heart
The human heart is a four chambered muscular pump that maintains double circulation through the pulmonary and systemic circuits. Questions cover atria, ventricles, valves, major blood vessels, the cardiac cycle, pressure changes, the conduction system and ECG, while distinguishing arteries and veins from the chambers that receive or eject blood.
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