1) The three sections of small intestine are the ______, the ______ and the ______.  Many enzymes are brought into small intestine from the ______.   Bile is also brought in through the ______ duct.     ______ are finger like projections on the inner surface of the small intestine which increases the surface area.  Digested nutrients are ______ through walls of the villi and then enter the ______ and the ______.

2) The key functions of digestive system are the ingestion of food, ______ of food through the digestive system, ______ by ______ and ______ digestion, ______ and ______.