How much water is in your organs?

As we age, and as the daily context of our lives changes, our water needs change as well.

The adult body is around two-thirds water, but the amount of water within different organs vary.

  • The brain and heart are 73% water
  • The lungs are 83% water
  • The skin is 64%
  • The bones are about 31% water*

Water serves essential functions in the body, including regulating the internal temperature, acting as a building material or lubricating joints.

*Mitchell et al. The chemical composition of the adult human body and its bearing on the biochemistry of growth. The Journal of Biological Chemistry 1945: 625-637