What is the importance of water content of the body?

4. Distribution of Body Fluid

40% body weight is solid.

60 % body weight is fluid.

  • 40% of the fluid is within the intercellular space
  • 15% of the fluid is within the interstitial space
  • 5% is plasma

INTRACELLULAR: Inside the cells (inside the cell) Fluid component is water K (high), Mg, PO4, SO4, Na (low) and protein molecule. All of these necessary for cell growth, repair and other functions.

INTERSTITIAL: Surrounds the cell low in protein drained away as lymph Na, Cl, HCO3

INTRAVASCULAR: Within the blood vessels Fluid is Plasma Na, Cl, Protein molecules.