Evidence by scanning electron microscopy for ependymal secretion into the cerebrospinal fluid and formation of Reissner's fiber by the subcommissural organ.
D000818:Animals; D001921:Brain / Q000648:ultrastructure*; D002415:Cats; D002535:Cerebral Aqueduct / Q000502:physiology / Q000648:ultrastructure; D002555:Cerebrospinal Fluid / Q000378:metabolism*; D006224:Cricetinae; D004805:Ependyma / Q000378:metabolism* / Q000648:ultrastructure; D004912:Erythrocytes / Q000502:physiology; D005260:Female; D006168:Guinea Pigs; D008297:Male; D008636:Mesencephalon / Q000378:metabolism / Q000648:ultrastructure*; D008855:Microscopy, Electron, Scanning; D011817:Rabbits; D013116:Spinal Cord / Q000378:metabolism / Q000648:ultrastructure*