title: Comparative ultrastructure of the cerebrospinal fluid-contacting neurons.
mesh_terms: D000663:Amphibians; D000818:Animals; D001717:Birds; D002552:Cerebral Ventricles / Q000502:physiology; D002555:Cerebrospinal Fluid / Q000502:physiology*; D005399:Fishes; D007031:Hypothalamus / Q000166:cytology; D008322:Mammals; D008526:Medulla Oblongata / Q000502:physiology; D009474:Neurons / Q000166:cytology* / Q000502:physiology; D009489:Neurosecretion; D012104:Reptiles; D013045:Species Specificity