Water – a life source

I think water is very important for human.

I think like that, because of this reasons:
First, water can dissolve substance.
Based on expert experiment, our body contain many poisonous substances. With the ability to dissolve substance, water can take out poison inside our body by dissolving it and take it out together with urine.
Second, water can make us healthy.
Surveys prove that a man who drink 8 glass of water a day will more healthy than a man who drink less than it.