What's the difference and functions of glucose glycogen and glucagon?

Storage & Release. Glycogen is a storage form of glucose. Glucagon is a hormone which, like insulin, also comes from the pancreas. When the body needs to utilize its stored glucose, glucagon is released to do it. Glycogen is mostly stored in the liver, but it is also contained in the kidneys and muscle.
Many. Glucose= sugar molecule that we metabolize as our main source of energy. Glucogen= prefered way of the body to store glucose, a complex that can be broken down into glucose relatively quickly, stored mainly in liver and muscle. Glucagon= hormone secreted by the Alpha cells of the pancreas that immidiately makes your glycogen break up into glucose to keep your blood glucose normal.