And these are the nutrients that are required by the cell to basically make ATP, make proteins and fats. Number four, we find a balance of electrolytes. We have sodium, we have chloride, we have calcium, magnesium, bicarbonate and other ions. And these are used not only to regulate the PH, but they are also used to actually control the zmodic pressure inside our blood. Number five, we also find waste products. So when the cells carry out their processes, they produce waste products such as, for example, urea, lactic acid, and our carbon dioxide.