In this activity, we will follow the path of glucose from the digestive system into the bloodstream. Glucose is a type of sugar and an important energy source that is needed by the body’s cells. Carbohydrates such as fruit, bread, and pasta are common sources of glucose. These foods are broken down into glucose, which is then absorbed from the digestive system into the bloodstream and distributed to the rest of the body. As part of the digestive process, the glucose molecules from the food you eat are dissolved into the liquid contents of the small intestine.