Why does the blood spurt out when an artery is cut?

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Multiple Choice

Why does the blood spurt out when an artery is cut?

Arteries carry blood under high pressure from the heart. When an artery is cut, that pressure forces the blood out quickly, so it spurts in time with each heartbeat. This pulsatile flow reflects the direct influence of the heart’s pumping action on arterial blood. Other options miss the main idea: arteries are indeed hollow, but that alone doesn’t cause a spurt; the rapid flow isn’t simply about being hollow. Blood in arteries isn’t blue—arterial blood is bright red because it’s oxygenated. And while there are exceptions to oxygenation in special circuits (like the pulmonary artery), the typical reason a cut artery spurts is the high pressure from the heart, not the color or the oxygen status.

Arteries carry blood under high pressure from the heart. When an artery is cut, that pressure forces the blood out quickly, so it spurts in time with each heartbeat. This pulsatile flow reflects the direct influence of the heart’s pumping action on arterial blood.

Other options miss the main idea: arteries are indeed hollow, but that alone doesn’t cause a spurt; the rapid flow isn’t simply about being hollow. Blood in arteries isn’t blue—arterial blood is bright red because it’s oxygenated. And while there are exceptions to oxygenation in special circuits (like the pulmonary artery), the typical reason a cut artery spurts is the high pressure from the heart, not the color or the oxygen status.

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