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Lumen

usgb/ˈluːmɪn/Volume
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Biological TubesPlay
Refers to interior of tubular structures in the body like veins. SlideThe surgeon examined the lumen to make sure there were no blockages.
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Not Always VisiblePlay
Understanding 'lumen' may involve medical images, as it's internal. SlideThe X-ray displayed a clear image of the lumen of the esophagus.
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Health IndicatorPlay
A clear lumen can indicate good health; blockages can signal problems. SlideHer healthy arteries had a wide lumen, allowing smooth blood flow.
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