title: Comparative aspects of the cerebrospinal fluid systems in vertebrates.
mesh_terms: D000818:Animals; D001812:Blood-Brain Barrier; D001921:Brain / Q000033:anatomy & histology*; D002555:Cerebrospinal Fluid / Q000502:physiology*; D006801:Humans; D008322:Mammals / Q000033:anatomy & histology / Q000134:cerebrospinal fluid; D008853:Microscopy; D008854:Microscopy, Electron; D014714:Vertebrates / Q000033:anatomy & histology / Q000134:cerebrospinal fluid*