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Fluid Homeostasis

Meaning

Fluid homeostasis is the essential physiological process of maintaining the precise volume and solute concentration of the body’s internal fluids, both intracellular and extracellular, within a very narrow range. This constant balance is vital because all cellular functions, including hormonal signaling and enzymatic reactions, depend on a stable, isotonic environment. Clinically, fluid balance is intrinsically linked to cardiovascular function, renal health, and electrolyte status, all of which are tightly regulated by the endocrine system. Disruption of this balance, such as dehydration or hyponatremia, can rapidly impair systemic function.