To bathe the cells in the body. To transport nutrients throughout the body. Transports oxygen to the cells. Keeps eyes, nose, mouth moist. In very hot and cold weather.
Water is lost in the heat through perspiration.
In the winter people stay indoors more often with the heat on, which can be very dry. B. Before and after exercising. To keep the body hydrated. Water is lost through perspiration. When eating a high fiber diet.