Medicine — Body Fluid Compartments

\text{TBW} \approx 60\%\ \text{of body mass}

\text{ICF} = \tfrac{2}{3}\text{TBW}, \quad \text{ECF} = \tfrac{1}{3}\text{TBW}

\text{plasma} = \tfrac{1}{4}\text{ECF}

\text{osmolarity} \approx 290\ \text{mOsm/L}