Patient Care Technician Certification (PCTC) AMCA Practice Exam

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Which heart chamber delivers oxygen-rich blood to the ascending aorta?

Right atrium
Left atrium
Left ventricle
Right ventricle

The correct answer is: Left ventricle

The left ventricle is the heart chamber responsible for delivering oxygen-rich blood to the ascending aorta. After blood is oxygenated in the lungs, it returns to the heart via the pulmonary veins and enters the left atrium. From there, blood flows into the left ventricle, which has thick muscular walls enabling it to pump the oxygen-rich blood with sufficient force into the ascending aorta. The ascending aorta is the primary vessel that carries this oxygenated blood to the rest of the body’s tissues and organs. In contrast, the other chambers play different roles in circulation. The right atrium receives deoxygenated blood from the body, the right ventricle pumps this deoxygenated blood to the lungs for oxygenation, and the left atrium holds the oxygenated blood before it moves to the left ventricle. Understanding this flow is crucial for recognizing how the heart functions in the circulatory system.