title: Ultrastructure of the photoreceptor of the planarian Dugesia dorotocephala. I. Normal eye.
mesh_terms: D000818:Animals; D001369:Axons; D002940:Circadian Rhythm; D003594:Cytoplasmic Granules; D003712:Dendrites; D005123:Eye / Q000166:cytology*; D006003:Glycogen; D008027:Light; D008854:Microscopy, Electron; D009476:Neurons, Efferent; D009940:Organoids; D010786:Photoreceptor Cells / Q000166:cytology*; D010860:Pigments, Biological; D013569:Synapses; D014419:Turbellaria / Q000166:cytology*
chemical_list: D010860:Pigments, Biological; D006003:Glycogen