HUMAN NUTRITION

Detailed explanation-1: -Glycogen is a main source of energy for the body. Glycogen is stored in the liver. When the body needs more energy, certain proteins called enzymes break down glycogen into glucose.

Detailed explanation-2: -Glucose, glycogen, and glucagon all help power your body, but they have different roles. Whereas glucose is found in your blood, glycogen is found mainly in your liver and muscle cells. Glucose is the basic unit of fuel for your cells, while glycogen is a collection of many glucose molecules, stored for future use.