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Lumen (anatomy)

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A lumen (Lat. lūmen, an opening or light) (pl. lumina) in biology is the inside space of a tubular structure, such as an artery or intestine.[1] By extension, a lumen can also be the inside space of a cellular component or structure, such as the endoplasmic reticulum.

Examples of luminaEdit

See alsoEdit


  1. Stedman's Medical Dictionary, 24th ed.
  2. Adds, John; Erica Larkcom, Ruth Miller. Exchange and transport, energy and ecosystems, Nelson Advanced science (Nelson Thornes web site).

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