Glycogen

Glycogen is a form of starch discovered in the mammalian liver that is easily broken down into glucose. This discovery showed that both plants and animals build up and break down complex molecules for energy storage and usage.
 Claude Bernard France 1856 Glycogen

Glycogen is a form of starch discovered in the mammalian liver that is easily broken down into glucose. This discovery showed that both plants and animals build up and break down complex molecules for energy storage and usage.