Animal starch or glycogen is a polymer that consists of a large number of glucose monomers. It was first described by German chemist Frederick Bernet in 1898. Starch is vital to the body as it is the main source of energy for cells, especially muscles and the central nervous system.
Glycogenesis is the process of formation of glycogen from glucose, one of the main functions of which is the accumulation of glucose stores in the muscles and liver to provide energy during exercise.