Plants and animals are comprised mainly of water.
In people, it serves as a solvent and a means of delivery, allowing vital vitamins and nutrients to be dissolved from meals and transported to cells. Water is used by our bodies to help metabolism, cleanse out pollutants, and control body temperature.
When chemist Henry Cavendish (1731–1810) worked with hydrogen and oxygen and combined these components to create an explosion, he discovered the chemical makeup of water (oxyhydrogen effect).
Two hydrogen (H) atoms and one oxygen (O) atom make up the three atoms that make up a water molecule. Because of this, water is occasionally abbreviated as H2O. There are billions of water molecules in a single drop of liquid.
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