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The Heart And Its Functions
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The heart is defined as "the cardiac muscle that maintains the circulation of the blood".It is divided into four cavities; two atria and two ventricles. The left atrium receives oxygenated blood from the lungs. From there the blood passes to the left ventricle, which forces it via the aorta, through the arteries to supply the tissues of the body. ....
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....ormed mainly by the right ventricle and part of the left ventricle. The posterior surface of the heart is flattened and rests upon the diaphragm muscle. Of its two borders, the right is the longest and thinnest, the left is shorter but thicker and round.
In an adult, the heart measures about five inches in length, three and a half inches in the br.... |
| Word count: 3410 |
Page count: 13 |
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