From the activities in teaching and studying research and knowledge formation i30201. I have studied about The demand for water in the human body. According to a study from books and learning materials to know. Is water up to two in three parts and vital organs had all but high water content is a lot like lungs filled with water almost 90% brains contained 75% or skin contact with the water element is approximately 35%. Thus, whenever the body lacks water, it will cause the cells shrink flattened circulation of the blood slows down due to intense bleeding. Heart, kidneys might stop working, hard working people who have symptoms of severe dehydration, agitation, pale function of every organ is going to start. Normally and eventually died. Generally, people can starve for a month. Without death But the lack of water just 3-7 days may result in death.