In a human digestive system, the process of digestion starts in Buccal cavity. The process of digestion begins from the mouth and is completed in the small intestine. When we consume food, it travels from our mouth and reaches our stomach through a long tube called an alimentary canal or the gastrointestinal tract. This alimentary canal or gastrointestinal tract begins from the mouth cavity and continues into the pharynx, stomach, large intestines, and finally stops at the anus. During the movement of food particles from the mouth to the stomach and to the small intestine, it gets digested gradually as they travel through various compartments of the gastrointestinal tract. The process ofdigestion begins from the mouth cavity and ends in the anus.