Body's water Regulation

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There are basically three stages to water regulation 
of the human bodyin the different phases of life.

One, the stage of life of a fetus in the uterus of the 
pregnant mother-to-be(to the left of B in the diagram).

Two, the phase of growth until full height and width
is achieved (approximately between the ages of 18 
to 25).

Three, the phase of life from fully grown stage 
to the demise of the person. During the intrauterine 
stage of cell expansion, water for cell growth of the 
child has to be provided by the mother.