What is the major use of carbohydrates in the human body?

The major function of carbohydrates is to provide energy.About half of the energy used by muscles and other body tissues is provided from glucose and glycogen, a storage form of carbohydrate.Grain foods, vegetables, fruits, and legumes provide lots of carbohydrates and fiber with little fat.Each gram of carbohydrate in food provides four calories of energy.Dietary carbohydrates provide glucose that body cells can use for energy.The Dietary Guidelines recommend 45% to 65%, or about half of daily calories, should come from carbohydrate foods.Few roles of carbohydrate are

1)Carbohydrates Provide Fuel for the Central Nervous System

2)Carbohydrates Provide Fuel for the Muscular System

3)Carbohydrates Supposedly Spare Proteins

4)Carbohydrates Supposedly Supply "Dietary Fiber"