title: Fluids in balance: introduction.
mesh_terms: D001826:Body Fluids / Q000502:physiology*; D004573:Electrolytes / Q000378:metabolism; D005504:Food Analysis; D006801:Humans; D011188:Potassium / Q000032:analysis; D012964:Sodium / Q000032:analysis; D014882:Water-Electrolyte Balance
chemical_list: D004573:Electrolytes; D012964:Sodium; D011188:Potassium