HUMAN NUTRITION

Detailed explanation-1: -Duodenum: This short section is the part of the small intestine that takes in semi-digested food from your stomach through the pylorus, and continues the digestion process. The duodenum also uses bile from your gallbladder, liver, and pancreas to help digest food.

Detailed explanation-2: -The large, hollow organs of the GI tract contain a layer of muscle that enables their walls to move. The movement of organ walls-called peristalsis-propels food and liquid through the GI tract and mixes the contents within each organ.

Detailed explanation-3: -The pylorus is the part of the stomach that connects to the small intestine. It includes the pyloric sphincter, which is a thick ring of muscle that acts as a valve to control the emptying of stomach contents (chyme) into the duodenum (first part of the small intestine).

Detailed explanation-4: -The three regions of the small intestine are the duodenum, jejunum, and ileum. The jejunum is about 0.9 meters (3 feet) long (in life) and runs from the duodenum to the ileum. Jejunum means “empty” in Latin and supposedly was so named by the ancient Greeks who noticed it was always empty at death.