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Percentage of water in the human body

What is the estimated percentage (in mass) of water in the human body? Is this percentage estimated to be greater in the adult or in the old individual?

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Around 65 percent of the human individual mass is water. The brain, for illustration, has approximately 90 percent of water in mass, the muscles, 85 percent and the bones encompass between 25 percent and 40 percent of water.

Younger adult individuals contain proportionally more water in mass than the older individuals.

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