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Glycogen
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A biochemical pathway diagram showing the catabolism and biosynthesis of glucose and glycogen, with glucose breakdown reactions on the left and synthesis reactions on the right, interconnected by labeled arrows and chemical intermediates.
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Claude Bernard
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Glycogen

biochemistry
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Glycogen, white, amorphous, tasteless polysaccharide (C6H1005)n. It is the principal form in which carbohydrate is stored in higher animals, occurring primarily in the liver and muscles. It also is found in various species of microorganisms—e.g., bacteria and fungi, including yeasts. Glycogen serves as an energy reservoir, being broken down to glucose when needed.