![In biology, a lumen (from Latin lumen, meaning 'an opening'; plural lumina) is the inside space of a tubular structure, such as an artery or intestine. - ppt download In biology, a lumen (from Latin lumen, meaning 'an opening'; plural lumina) is the inside space of a tubular structure, such as an artery or intestine. - ppt download](https://slideplayer.com/16137228/95/images/slide_1.jpg)
In biology, a lumen (from Latin lumen, meaning 'an opening'; plural lumina) is the inside space of a tubular structure, such as an artery or intestine. - ppt download
Anatomical Terminology - Lumen (pleural lumina) This word comes from French 'lumen', coined by French physicist André-Eugène Blondel from Latin 'lumen' meaning 'light'. The Romans also used the term for the aperture
![CRI should never be used in efficacy regulations but a new lumen definition should (MAGAZINE) | LEDs Magazine CRI should never be used in efficacy regulations but a new lumen definition should (MAGAZINE) | LEDs Magazine](https://img.ledsmagazine.com/files/base/ebm/leds/image/2016/11/content_dam_leds_printarticles_volume_13_issue_9_1611leds_43.png?auto=format&w=500&h=281&fit=clip)