Electrolytes and Body Fluids

Body Fluid Composition

  • Total body composition: approximately 60%60\% water and 40%40\% solids/fat.
  • Total body water is divided into:
    • Extracellular Fluid (ECF): Fluid outside cells.
      • Comprises plasma volume (PV) and interstitial fluid (ISF).
      • Plasma is mostly H2OH_2O with dissolved substances.
      • Interstitial Fluid (ISF) surrounds cells, acting as a