title: Retinotectal connections in the tortoise: an electron microscope study of degeneration in optic nerve and midbrain tectum.
mesh_terms: D000818:Animals; D003593:Cytoplasm; D008636:Mesencephalon / Q000473:pathology*; D008854:Microscopy, Electron; D008928:Mitochondria; D009410:Nerve Degeneration; D009413:Nerve Fibers, Myelinated; D009457:Neuroglia; D009900:Optic Nerve / Q000473:pathology / Q000503:physiopathology*; D013997:Time Factors; D014426:Turtles / Q000033:anatomy & histology*