After accounting for bones, muscle, organs, blood and other guts, much of the human body is actually made up of water. Approximately what percentage of the body is H₂O?

In some organisms, 90% of their body is made up of water. In the case of people, it's closer to 60%, though the brain and the heart are made up of almost 75% water, and the lungs are about 83% water.

Asked by Tom Cohen · Last updated 5 years ago · 8.5K views