Why do we need to have fluid intake everyday?

Question

Any idea on how long people can live without fluid intake?

Answer 1

To LIVE!

To avoid dehydration.

Answer 2

SO WE DON'T DEHYDRATE AND DIE!! Heheee

Answer 3

I think Uhura is a very intelligent woman. Listen to her you might live to be 100... I totally agree with her and the OLD MAN's  answer.  

Answer 4

god made us that way

about a week

Answer 5

The survival rule is: 3 hours without shelter, 3 days without water, 3 weeks without food

Wikipedia's average of three or four days seems a bit short, but maybe not if you figure in elderly people in hot climates, where life expectancy without water is a matter of hours. Also, digestion requires a lot of water, so if a person is not drinking, should we assume they are not eating, as well? Another big variable (which you explicitly recognize) is whether the person doing the surviving has shelter, or at least reasonable clothing, including a hat, which could vastly decrease perspiration loss, extending survival significantly

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