title: OBSERVATIONS ON THE FINE STRUCTURE OF PHOTORECEPTOR CELLS IN THE PLANARIAN DUGESIA TIGRINA.
mesh_terms: D000818:Animals; D001369:Axons; D003585:Cell Biology; D002467:Cell Nucleus; D004583:Electrons; D005123:Eye; D006376:Helminths; D008027:Light; D008853:Microscopy; D008854:Microscopy, Electron; D008928:Mitochondria; D009474:Neurons; D010786:Photoreceptor Cells; D010932:Planarians; D012106:Research; D011984:Sensory Receptor Cells
keywords: AXONS; CELL NUCLEUS; CYTOLOGY; EXPERIMENTAL LAB STUDY; EYE; HELMINTHS; LIGHT; MICROSCOPY, ELECTRON; MITOCHONDRIA; NEURONS; RECEPTORS, NEURAL