<P> The adult human body averages ~ 53 % water . This varies substantially by age , sex , and adiposity . In a large sample of adults of all ages and both sexes , the figure for water fraction by weight was found to be 48 ± 6 % for females and 58 ± 8 % water for males . Water is ~ 11 % hydrogen by mass but ~ 67 % hydrogen by atomic percent , and these numbers along with the complementary % numbers for oxygen in water , are the largest contributors to overall mass and atomic composition figures . Because of water content , the human body contains more oxygen by mass than any other element , but more hydrogen by atom - fraction than any element . </P>
<P> The adult human body averages ~ 53 % water . This varies substantially by age , sex , and adiposity . In a large sample of adults of all ages and both sexes , the figure for water fraction by weight was found to be 48 ± 6 % for females and 58 ± 8 % water for males . Water is ~ 11 % hydrogen by mass but ~ 67 % hydrogen by atomic percent , and these numbers along with the complementary % numbers for oxygen in water , are the largest contributors to overall mass and atomic composition figures . Because of water content , the human body contains more oxygen by mass than any other element , but more hydrogen by atom - fraction than any element . </P>
which element is most present in the human body
which element is most present in the human body
oxygen
oxygen