title: Structure and ultrastructure of the central nervous system of the polychaete Nephtys, with special reference to photoreceptor elements.
mesh_terms: D000818:Animals; D000845:Annelida / Q000033:anatomy & histology*; D001921:Brain / Q000166:cytology; D002462:Cell Membrane; D002467:Cell Nucleus; D002490:Central Nervous System / Q000166:cytology*; D003896:Desmosomes; D004721:Endoplasmic Reticulum; D005123:Eye / Q000166:cytology; D006056:Golgi Apparatus; D002479:Inclusion Bodies; D008854:Microscopy, Electron; D008928:Mitochondria; D010786:Photoreceptor Cells / Q000166:cytology*; D010860:Pigments, Biological
chemical_list: D010860:Pigments, Biological