title: Fine structural changes induced by cirdadian light-dark cycles in photoreceptors of Dalyelliidae (Turbellaria: Rhabdocoela).
mesh_terms: D000818:Animals; D002462:Cell Membrane / Q000648:ultrastructure; D002467:Cell Nucleus / Q000648:ultrastructure; D002843:Chromatin / Q000648:ultrastructure; D002940:Circadian Rhythm; D003594:Cytoplasmic Granules / Q000648:ultrastructure; D003623:Dark Adaptation; D004721:Endoplasmic Reticulum / Q000648:ultrastructure; D008027:Light; D008870:Microtubules / Q000648:ultrastructure; D008928:Mitochondria / Q000648:ultrastructure; D010786:Photoreceptor Cells / Q000648:ultrastructure*; D014419:Turbellaria / Q000648:ultrastructure*
chemical_list: D002843:Chromatin