Glucose is essential for energy in all the living organisms. When we have more glucose than needs in our bloodstream, then the excess glucose is stored as large compounds as Glycogen. This glycogen fills the cells of the liver and available for any quick shots of energy.
Hence, Liver is called as warehouse for the excess glucose.
Most electric, gas, and water companies are examples of natural monopolies. Utilities like water, electricity and gas are essential services that play a vital role in economic and social development.