Certified Tumor Registrar (CTR) Practice Exam

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What vessels are responsible for carrying oxygenated blood from the heart to the extremities?

Veins
Arteries
Capillaries
Venules

The correct answer is: Arteries

The correct response highlights the role of arteries in the circulatory system. Arteries are the vessels that carry oxygenated blood away from the heart to various parts of the body, including the extremities. They are equipped with thick muscular walls that enable them to withstand and regulate the high pressure of blood pumped from the heart. After blood is oxygenated in the lungs, it returns to the heart via the pulmonary veins and is then distributed through the aorta, the main artery, which branches off to carry oxygen-rich blood to the arms, legs, hands, and feet. This delivery of oxygen and nutrients to tissues is essential for cellular metabolism and overall bodily function. On the other hand, veins are responsible for returning deoxygenated blood back to the heart, capillaries are the tiny vessels where the exchange of oxygen and carbon dioxide occurs at the tissue level, and venules are small veins that collect blood from capillaries and funnel it into larger veins. This roles contrast with that of arteries, establishing why arteries are the correct answer to the question posed.