Digestive System Function - This 1 minute 48 second animated video shows a graphic illustration of the entire digestive system (from oral cavity and esophagus ALL the Way to the rectum). It describes the small intestine and its function, the digestive system function of the mucosa, and even touches on the pancreas/liver. Also explains about the villus which are located in the small intestine (and about the structure of the villus).
IN A NUTSHELL:
Explains the chemical process of digestion. Brief but clear.