Water is essential to the body because it transports nutritional elements to the cells and helps remove waste products. It also contributes to the exchanges between the cells and the different body fluids.
A delivery service for the cells
Water is critical to cellular life because it carries nutritional elements that cells need.
Water also helps eliminate waste from the body, much of which comes from proteins, in the form of nitrogenous waste (urea, creatinine, ammonium ions and urates). This is eliminated via the urine after a process of filtration, reabsorption, secretion and elimination in the kidneys.
Did you know?
We have approximately 5 liters of blood in our body. Our two kidneys filter about 180 liters of blood volume a day (125 ml/minute), performing this filtration some 50 to 60 times a day(2). Yet we only urinate 1.2 to 2 liters of urine daily. The kidneys have extraordinary powers of filtration and concentration!
Sources: (1) Haüssinger D., The role of cellular hydration in the regulation of cell function, Biochemical Journal Feb 01, 1996, 313 (3) 697-710;
; (2) Valtin and Schafer, Renal function: mechanisms preserving fluid and solute balance in health 3rd ed.1995