Normal water levels in the human body ranges from 70 to 80% of body weight. In the body, water is supposed to undergo a process of absorption in the small intestine, reabsorption in the large intestine, also undergo the process of spending through the sweat glands and urinary tract / urinary.
Water content in the body must always be balanced at normal levels. If there is a situation in which the water content in the body down from the levels should be, then the body will directly request the replacement of lost water content, and hence why we need a drink. Similarly, if the current level is more than enough water, the body will release the excess water through the urinary tract. Frequent urination every day depending on habits, the amount of fluid you drink, cold air, and the bladder muscle strength.
If the loss of the water content is not immediately replaced, the water content of the body will fall to levels below normal levels, and the body will become dehydrated.