title: Peering through the windows of the brain.
mesh_terms: D000818:Animals; D001812:Blood-Brain Barrier; D001921:Brain / Q000098:blood supply / Q000502:physiology*; D002196:Capillaries / Q000033:anatomy & histology / Q000502:physiology; D002552:Cerebral Ventricles / Q000502:physiology; D002555:Cerebrospinal Fluid / Q000502:physiology; D006706:Homeostasis; D006801:Humans; D008833:Microcirculation / Q000502:physiology; D008954:Models, Biological; D009434:Neural Pathways / Q000502:physiology; D018377:Neurotransmitter Agents / Q000502:physiology*
chemical_list: D018377:Neurotransmitter Agents