If there is too much water in the internal environment, the salt concentration will decrease, water will enter the cells, they will swell and their work will be disrupted. This happens if a person consumes distilled water for a long time. If the water contains too many salts (sea water, for example), the concentration of salts in the blood, tissue fluid and lymph can increase so much that the water from the cells begins to go into the internal environment and the cells stop working as a result of dehydration.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.