WATER! IT'S NECESSARY...

Your body uses water in all its cells, organs, and tissues to help regulate its temperature and maintain other bodily functions. Because your body loses water through breathing, sweating, and digestion, it's important to rehydrate by drinking fluids and eating foods that contain water.

The Functions of Water
 
Cell life
Water is a carrier, distributing essential nutrients to cells, such as minerals, vitamins and glucose.

Chemical and metabolic reactions
Water removes waste products including toxins that the organs’ cells reject, and removes them through urine and feces.

Transport of nutrients
Water participates in the biochemical break-down of what we eat.

Body temperature regulation
Water has a large heat capacity which helps limit changes in body temperature in a warm or a cold environment. Water allows the body to release heat when ambient temperature is higher than body temperature (1). The body begins to sweat, and the evaporation of water from the skin surface very efficiently cools the body.

Elimination of waste
Water is an effective lubricant around joints. It also acts as a shock absorber for eyes, brain, spinal cord and even for the foetus through amniotic fluid.

Reference: Nestle Water