A nurse is educating a group of nursing students about the heart's chambers and the muscular septum wall. What information by a nursing student demonstrates a correct understanding about the four chambers into which the heart is divided?
1 . The interior of the heart is divided into two chambers.
2 . The thin-walled, low-pressure chambers are the receiving centers for blood.
3 . Ventricles are high-pressure chambers because they pump blood out of the heart.
4 . The left ventricle is the thickest chamber and it pumps blood to the rest of the body.
A) 1, 2, 3
B) 1, 2, 4
C) 1, 3, 4
D) 2, 3, 4
D
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The interior of the heart is divided into four chambers. The two upper chambers are the right and left atria. These thin-walled, low-pressure chambers are receiving centers for blood. The two lower chambers are right and left ventricles. Ventricles are high-pressure chambers; they pump blood out of the heart. The left ventricle must contract with sufficient force to send blood to the entire body; therefore, its muscle walls are thickest and its internal pressures the highest.
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