Our Body's Heart

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Like all active muscles, the human heart too, delivers oxygen and nutrients to each of its muscle fibers and supporting tissues. About five percent of the blood volume pumped by the heart flows into two coronary arteries roughly the size of drinking straws. These arteries branch off the aorta immediately after it protrudes from the left ventricle with its fresh load of oxygenated blood.

THE HEART'S BLOOD SUPPLY

wma sound file about the heart

The right coronary artery supplies blood to the bottom, back and right side of the heart. The left main coronary artery splits into two branches: the left circumflex artery and the left anterior descending artery. These left coronary arteries supply blood to the front, left side and back of the heart.

All of the coronary arteries divide into increasingly smaller arterial vessels. which then feed into the microscopic capillaries that nourish the muscle (myocardium) and other structures within the heart.


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