Scheme of Chloroplast Structure Stock Vector - Illustration of university, lumen: 112930613
Arteries | BioNinja
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
Development of an atherosclerotic plaque that progressively narrows the lumen of an artery to the po - Biology Forums Gallery