The first 12 inches is called the duodenum. The next 9 feet is the jejunum and the last half is called the ileum. The large intestine, also called the colon is approximately 10 feet long. There are many organs associated with the alimentary tract, all of which aid in eating, digestion and excretion. The teeth masticate food.
Saliva wets the food and helps in swallowing.
The large intestine or colon recaptures water and minerals like salt, and is involved in elimination. Two very important digestive organs are located in the upper abdomen. The abdomen is the body space below your chest where the stomach and intestines reside. The first is the liver which lies in the upper right side of the abdomen. The liver produces bile, which is a digestive enzyme used to digest fat.