Why do we (and animals) need to drink water?
In: Biology
As the other commenters describe, we are mostly water.
The reason we need to take in new water instead of just continuously using the same water is, dissolving waste products in water and getting rid of them in the form of pee is one source of water loss, and evaporation from the skin, eyes, and mouth is another. If we didn’t drink water, we would lose water in this way, and wouldn’t have enough for our cellular chemistry to keep functioning.
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