The duodenum in the small intestine breaks down the food. The jejunum and the ileum absorb any needed nutrients and send them into the main bloodstream, according to the Cleveland Clinic located in Cleveland, Ohio. The inner lining of the small intestine has folded back and forth to increase the surface area for a better absorption of healthy nutrients for the human body. Hope this helps, and Brainliest would be nice! : )
Has been shown to be invalid by research
Rain water, underground water and surface water.
