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What is your body made of?

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The human body's chemical composition consists of a variety of elements and compounds. By mass, human cells consist of 65–90% water (H2O), and a significant portion is composed of carbon-containing organic molecules. Oxygen therefore contributes a majority of a human body's mass, followed by carbon. 99% of the mass of the human body is made up of the six elements oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. --Killymcgee 11:07, 2 June 2009 (UTC)

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