Answer
The digestive system can be divided anatomically into two sets of structures: they are the structures of the digestive tract proper, and the accessory organs. The former (digestive tract) is a muscular tube that goes from the mouth to the anus . Because it is open at both ends-- oral orifice and anal orifice--substances in the alimentary canal are not technically ( anatomically) within the body.
Work Step by Step
The organs of the digestive tract proper are the mouth, the pharynx, the esophagus, the stomach, the small intestine and the large intestine. The structures considered accessory organs are the teeth, tongue, salivary glands, liver, gallbladder, and pancreas. Most of these structures lie outside the alimentary canal, and communicate with it by ducts or by endocrine secretions.
