The digestive tract is composed of:
The oral cavity
The pharynx
The esophagus
The Stomach
The small intestine (or small intestine)
The large intestine
The mouth is the beginning of the digestive tract; And, in fact, digestion starts here when taking the first bite of food. Chewing breaks the food into pieces that are more easily digested, while saliva mixes with food to begin the process of breaking it down.