Oregon Certified Nursing Assistant State Practice Exam

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What are the two upper chambers of the heart called?

Left and right vein
Left and right capillary
Left and right atrium
Left and right lung

The correct answer is: Left and right atrium

The upper chambers of the heart are referred to as the left and right atria (singular: atrium). These chambers play a crucial role in the heart's function by receiving blood from the body and the lungs. The right atrium receives deoxygenated blood from the body through the superior and inferior vena cavae, while the left atrium receives oxygenated blood from the lungs via the pulmonary veins. This organization is essential for ensuring that oxygen-poor blood is sent to the lungs for oxygenation and that oxygen-rich blood is distributed to the rest of the body. The structure and function of the atria contribute to the overall efficiency and effectiveness of the circulatory system, highlighting their importance in maintaining proper blood flow and heart function.