Man is loosing water and water vapour via urine, stool, respiration and the skin (''persperatio insensibilis''). The amount lost every day is temperature and activity dependent and amounts to around 800 ml of water. At the same time, water is built up via oxidative processes (about 300 ml per day). | Man is loosing water and water vapour via urine, stool, respiration and the skin (''persperatio insensibilis''). The amount lost every day is temperature and activity dependent and amounts to around 800 ml of water. At the same time, water is built up via oxidative processes (about 300 ml per day). |