Explain the importance of water and mineral salts for the body.

The body is mostly water. At different periods of life, its percentage changes and the older it is, the less water in the body. Lack of water leads to cell destruction and irreversible changes in the body. In water, salts are converted into cations and anions, because it is a universal solvent. It is in this form that they perform their functions, ranging from cellular transport (sodium-potassium pump), and ending with muscle contractions or the work of the kidneys.