title: Sensitivity of regenerating and degenerating planarian photoreceptors to osmium fixation.
mesh_terms: D000447:Aldehydes; D000818:Animals; D006652:Histological Techniques; D008854:Microscopy, Electron; D009992:Osmium; D012160:Retina / Q000166:cytology*; D014419:Turbellaria / Q000033:anatomy & histology*
chemical_list: D000447:Aldehydes; D009992:Osmium