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Acadian EMR Practice Test

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Which chamber of the heart ejects blood out into the body?
Correct Answer:
Left ventricle
Explanation:
The left ventricle is the chamber that ejects blood into the body. It pumps oxygen-rich blood into the aorta, the main artery of the systemic circulation, supplying all tissues. The left ventricle has the thickest muscular wall to generate the high pressure needed for this widespread flow. In contrast, the right ventricle sends blood to the lungs for oxygenation, while the atria mainly receive blood and transfer it to the ventricles. So the chamber that ejects blood out into the body is the left ventricle.

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