Bodies of Water

A computer monitor with a skeleton and information being displayed about different body tissues.

Water is a major component of the human body.

How it works

Photograph your body's silhouette, then see it 'fill up' onscreen to show how much water is in your body, including various organs.

Things to try or ask around the exhibit

  • How much of your body consists of water?
  • Do you contain more water or less water than someone who's taller than you?


Roughly 70% of the human body is composed of water. While water is easily recognisable as a component of saliva, urine and blood, it is actually found throughout the whole body, in every cell and tissue, to perform a range of functions.

Water acts as a solvent to dissolve gases, nutrients, enzymes, acids and metabolic waste molecules, so they can be carried between different cells and organs. Water is also used for temperature regulation when a person perspires to cool down in the heat.

Finding the science in your world

When the human body loses water, it must be replaced through food and drink. If water volumes are not replaced within the body, dehydration may occur and humans who do not consume water through food or drink usually die within a week or so.