Kaplan Nursing Entrance Practice Exam

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What are the chambers of the vertebrate heart called?

Atria and ventricles
Aorta and vena cava
Atria and auricles
Left and right atrium

The correct answer is: Atria and ventricles

The chambers of the vertebrate heart are referred to as atria and ventricles. In the anatomy of the heart, the atria are the upper chambers responsible for receiving blood returning to the heart, while the ventricles are the lower chambers that pump blood out of the heart. This division is crucial for the effective circulation of blood throughout the body. Aorta and vena cava refer to major blood vessels connected to the heart: the aorta carries oxygenated blood away from the heart, while the vena cava brings deoxygenated blood back to it. Atria and auricles are terms that often cause confusion, as the auricles are small extensions or flaps of the atria, but do not constitute separate chambers. Lastly, referring only to the left and right atrium would ignore the significant function of the ventricles, which are equally as vital in the heart’s structure and function.