Glycogen is primarily stored in which organs of the body?

Glycogen is primarily stored in the liver and muscles because these organs play a crucial role in energy metabolism. The liver acts as a central hub for glycogen storage, and it can release glucose into the bloodstream when the body requires energy, especially between meals or during physical activity. Muscle tissue, on the other hand, stores glycogen to provide a readily available energy source for contraction during exercise. This localized storage allows for efficient energy use during various physical demands.

The other options include organs that do not primarily function in glycogen storage, as they have different roles within the body. The heart and lungs are involved in circulation and respiration, the kidneys focus on filtration and waste removal, and the brain primarily utilizes glucose directly rather than storing it as glycogen. The skin does not serve as a storage site for glycogen either, as its primary function relates to protection and sensation. Therefore, the liver and muscles are the key organs for glycogen storage.