title: Morphometric analysis of a fibre system in the central nervous system.
mesh_terms: D000818:Animals; D001369:Axons; D001699:Biometry; D004847:Epithelial Cells; D008854:Microscopy, Electron; D009186:Myelin Sheath; D009413:Nerve Fibers, Myelinated; D009457:Neuroglia; D009474:Neurons; D009900:Optic Nerve / Q000033:anatomy & histology / Q000166:cytology*; D051381:Rats