What is the primary storage form of energy in the body?

The primary storage form of energy in the body is glycogen. Glycogen is a polysaccharide that consists of many glucose molecules linked together and is predominantly stored in the liver and muscles. When the body requires energy, glycogen can be broken down into glucose and released into the bloodstream or used directly in muscular activity.

This energy storage is crucial because it allows the body to maintain blood sugar levels and provide a readily available energy source for physical activities. While cellulose, starch, and sucrose are all forms of carbohydrates, they serve different roles. Cellulose is a structural component in plant cell walls and is not digestible by humans. Starch is a storage form of energy in plants and is broken down into glucose, but it is not how the body stores energy. Sucrose, commonly known as table sugar, is a disaccharide that provides quick energy but is not a storage form itself. Thus, glycogen is the most relevant and effective form of energy storage in human physiology.