Glycogen is a multibranched polysaccharide that serves as a form of energy storage in animals and fungi. Glycogen is the animal version of starch, a glucose polymer in plants. This is a picture of a bottle of syrup. Syrup has a lot of of sugars “stored”. Sugars are used for energy storage. Syrup is a thick, viscous liquid consisting primarily of a solution of sugar in water, containing a large amount of dissolved sugars. Glycogen and syrup are alike in the way that they both have stored chemical energy.