Which feature best distinguishes an artery from a vein?
Correct answer: C. An artery has a thicker muscular wall and smaller lumen
- A. An artery has thinner walls and valves
- B. An artery carries blood only toward the lungs
- C. An artery has a thicker muscular wall and smaller lumen
- D. An artery allows most fluid exchange with tissues
Explanation
Arteries carry blood away from the heart under higher pressure, so they have thicker muscular and elastic walls with relatively smaller lumens. Veins have thinner walls, larger lumens, and valves that help prevent backflow.
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About Cardiovascular System
The cardiovascular system covers the chambers, valves and major vessels of the heart, the cardiac cycle, conduction pathway, blood pressure and the circulation through pulmonary and systemic circuits. It also explains artery, vein and capillary structure, exchange at capillary beds, and how the cardiac cycle differs from general blood flow.
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40 free Cardiovascular System MCQs from Anatomy and Physiology for Nursing, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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