Q:

People with occupations that involve standing all day are at risk of varicose veins. Why should this be true?

belongs to book: Examination Questions and Answers in Basic Anatomy and Physiology|Martin Caon|| Chapter number:12.3| Question number:45

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2022-10-18

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People with occupations that involve standing all day are at risk of varicose veins. Why should this be true?

Veins have a larger lumen than arteries so hold more blood which distends them
Veins have only two tunics so their walls are more easily stretched into varicosity.
Gravity acting on blood in the legs puts stress on the vessel walls increasing the likelihood that they will stretch and distort.
When standing still, the valves stay open and blood accumulates in the leg veins.

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waelhammad

2022-10-18

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C: Gravity acting on the blood in the legs of a standing person increases the strain on the walls of a vein. A weakness will lead to the walls becoming distended and the valve not operating correctly.

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