What is the primary function of the cell lumen in flame cell? - Quora
An Overview of Photosynthesis | Biology for Majors I
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
Opening ahead: early steps in lumen formation revealed | Nature Cell Biology
Lumen (anatomy) - Wikipedia
Uterine lumen fluid is metabolically semi-autonomous | Communications Biology