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On average, the human body is composed of about 65% oxygen by mass, primarily in the form of water (H2O) and other organic molecules. This oxygen is essential for cellular respiration, which is the process by which cells generate energy.

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1y ago

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How much percent is oxygen in the human body?

Oxygen makes up about 65% of the human body by mass.


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How much of the body is oxygen?

Each human body has a different about of oxygen in it. A male weighing about 148 pounds has 65% oxygen.


How much of the human body is composed of freaking oxygen?

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