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Absorption. Digested food molecules are absorbed in the small intestine. This means that they pass through the wall of the small intestine and into our bloodstream. Once in the bloodstream, the digested food molecules are carried around the body to where they are needed.
The duodenum breaks down the food. The jejunum and the ileum absorb nutrients and send them into the bloodstream, according to the Cleveland Clinic. The inner lining of the small intestine is folded back and forth to increase surface area for better nutrient absorption. These folds create microscopic finger-like projections that are called villi.