Waste materials in the body are excreted utilising the use of water as well through the process of perspiration, urination and defecation. This process uses the kidneys and liver to process the waste materials and excrete them from your system via urination using kidneys and bladder or defecation through the intestinal tract and passed as faeces.
Digestion is another major role in which water is essential. The first process of digestion is when food enters the mouth. Enzymes found in saliva, which is in essence water helps start the break down of certain essential elements in our foods and water aids the whole digestion process of the foods from entering the mouth to leaving in the form of stools. Fibre is needed for good bowel movements and health and keeps stools soft and key to water soluble fibre digestion is water.
How much water our bodies need are dependent of a multitude of factors. We discussed health conditions, climate and activities as a increased need to drink water, but the body will tell us when we need water. Thirst will be an indicator and as a visual aid look at your urine. To get an idea