Each of the two lower chambers of the heart that pumps blood out of the heart?

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Multiple Choice

Each of the two lower chambers of the heart that pumps blood out of the heart?

Explanation:
The lower chambers are ventricles, and they are the pumping chambers of the heart. Each ventricle pushes blood out: the right ventricle sends blood to the lungs via the pulmonary artery, while the left ventricle pushes blood to the rest of the body through the aorta. The upper chambers, called atria, simply receive blood returning to the heart. The aorta and pulmonary veins are vessels, not chambers, and thus not the structures that pump blood out of the heart.

The lower chambers are ventricles, and they are the pumping chambers of the heart. Each ventricle pushes blood out: the right ventricle sends blood to the lungs via the pulmonary artery, while the left ventricle pushes blood to the rest of the body through the aorta. The upper chambers, called atria, simply receive blood returning to the heart. The aorta and pulmonary veins are vessels, not chambers, and thus not the structures that pump blood out of the heart.

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