Lumen (anatomy)

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Cross section of the gut. The lumen is the space in the middle.

In biology, a lumen (plural lumina) is the inside space of a tubular structure, such as an artery or intestine.[1] It comes from Latin lumen, meaning 'an opening'.

It can refer to:

In cell biology, a lumen is a membrane-defined space that is found inside several organelles, cellular components, or structures:

Transluminal procedures[edit]

Transluminal procedures are procedures occurring through lumina, including:

See also[edit]


  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). p. 16. ISBN 0-7487-7487-4.