MetabolismGlycogen/ GLY-kuh-jen /The body's stored form of carbohydrate, held in the liver and muscles and depleted in the early hours of a fast. Related Terms CatabolismMETABOLISM Adipose TissueMETABOLISM Basal Metabolic Rate (BMR)METABOLISM Beta-Hydroxybutyrate (BHB)METABOLISM