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
What is lumen in biology? - Quora
Biology for Majors I (Waymaker Bundle):Fletcher Technical Community College
An Overview of Photosynthesis | Biology for Majors I
Structure of the human heart and intestine. (a) The lumen of the heart... | Download Scientific Diagram
Lumen (anatomy) - wikidoc
Molecular Regulation of Lumen Morphogenesis - ScienceDirect
Molecular mechanisms of de novo lumen formation | Nature Reviews Molecular Cell Biology
The Narrowing of Lumen in the Intestines
Chapter 10 - Welcome to AP BIOLOGY!
Opening ahead: early steps in lumen formation revealed | Nature Cell Biology