Water is the essential nutrient that is needed for all bodily functions. The human body is composed of 80% water. There is a scientific taught that says that the human body can survive weeks without food but without water for three days it will surely die. The blood that circulates through the body serves as transporter of oxygen to the different parts of the body. It is composed of cells and an aqueous solution (plasma) and our body weight is composed of 8% of the blood.
