Elements in the Human Body
99% of the mass of the human body is made up of only six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Every organic molecule contains carbon. Since 65-90% of each body cell consists of water (by weight), it isn't surprising that oxygen and hydrogen are major components of the body.
Here's is a look at the major elements in the body and what these elements do.
Images 1-11 of 11
 Oxygen |  Carbon |  Hydrogen |  Nitrogen |
 Calcium |  Phosphorus |  Potassium |  Sodium |
 Chlorine |  Magnesium |  Sulfur |
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