title: The cerebrospinal fluid and the extracellular fluid of the brain. Introductory remarks.
mesh_terms: D001812:Blood-Brain Barrier; D001921:Brain / Q000378:metabolism*; D002555:Cerebrospinal Fluid / Q000032:analysis / Q000502:physiology; D002560:Cerebrovascular Circulation; D005110:Extracellular Space; D006801:Humans