Saliva.
The digestive tract is considered to be outside the body in terms of its function. It is a continuous tube that runs from the mouth to the anus, and while it is enclosed within the body, it is technically an external environment because it is open to the outside at both ends. The substances that enter the digestive tract are not part of the body's internal environment until they are absorbed into the bloodstream.
digestive begins in the mouth
The Pharynx leads from the mouth to the esophagus and then down to the digestive tract.
Salivary glands.
Both the mouth and the anus are openings in the body that serve as pathways for substances to enter and exit. They are part of the digestive system, where the mouth takes in food and begins the digestive process, while the anus expels waste. Additionally, both areas are lined with sensitive tissues and contain muscle control for their respective functions.
The digestive tract consists of the mouth, the throat, the stomach, the intestines, the rectum, and the anus. The liver and pancreas are attached to the digestive tract by the means of tubes, so they can supply their own digestive fluids and enzymes, however they do not lay within the digestive tract.
The digestive system starts at the mouth.
mouth
Digestive enzymes are absorbed in the small intestine. Digestive enzymes are produced by the digestive tract to break down the nutrients in food.
The digestive track is a long twisting tube from the mouth to the
The mouth.
At your mouth