The balance of fluid in the BODY FLUID COMPARTMENTS; total BODY WATER; BLOOD VOLUME; EXTRACELLULAR SPACE; INTRACELLULAR SPACE, maintained by processes in the body that regulate the intake and excretion of WATER and ELECTROLYTES, particularly SODIUM and POTASSIUM.

Synonyms: Balance, Water-Electrolyte, Balance, Fluid, Fluid Balance, Water-Electrolyte Balance, Electrolyte Balance, Balance, Electrolyte, Water Electrolyte Balance