Lumen ( anatomy ) - wikipedia Lumen ( anatomy ) For other uses, see Lumen ( disambiguation ). 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. It comes from Latin lumen, meaning ' an opening '. It can refer to : The interior of a vessel, such as the central space in an artery or vein through which blood flows. The interior of the gastrointestinal tract The pathways of the bronchi in the lungs The interior of renal tubules and urinary collecting ducts The pathways of the female genital tract, starting with a single pathway of the vagina, splitting up in two lumina in the uterus, both of which continue through the fallopian tubes In cell biology, a lumen is a membrane - defined space that is found inside several organelles, cellular components, or structures : thylakoid, endoplasmic reticulum, Golgi apparatus, lysosome, mitochondrion, or microtubule Transluminal procedures Transluminal procedures are procedures occurring through lumina, including : Natural orifice transluminal endoscopic surgery in the lumina of, for example the stomach, vagina, bladder, or colon Procedures through the lumina of blood vessels, such as various interventional radiology procedures : Percutaneous transluminal angioplasty Percutaneous transluminal commissurotomy See also Foramen, any anatomical opening Thylakoid lumen References Jump up ^ Stedman 's Medical Dictionary, 24th ed. Jump up ^ Adds, John ; Erica Larkcom ; Ruth Miller. Exchange and transport, energy and ecosystems. Nelson Advanced science ( Nelson Thornes ). p. 16. ISBN 0 - 7487 - 7487 - 4. Retrieved from `` https://en.wikipedia.org/w/index.php?title=Lumen_(anatomy)&oldid=834127676 '' Categories : Anatomy Blood Talk About Wikipedia Català Čeština Deutsch Español فارسی Français Galego 한국어 हिन्दी Bahasa Indonesia Italiano עברית Македонски Nederlands 日本 語 Português Slovenščina Svenska 10 more Edit links This page was last edited on 4 April 2018, at 02 : 25. Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: what is the meaning of lumen in biology
Answer: the inside space of a tubular structure, such as an artery or intestine