The alimentary canal refers to the digestive system, which starts from the mouth and ends at the anus. While this term is commonly used, there are several other synonyms for the same that are equally popular. The first one is the digestive tract, which refers to the organs of the digestive system and includes the esophagus, stomach, small intestine, large intestine, and rectum. Another synonym is the gastrointestinal (GI) tract, which is the same as the digestive system. The gut is also another word that refers to the entire digestive system, while the alimentary tract and alimentary system both encompass the same set of organs. Lastly, the enteric system is another term for the digestive system, emphasizing the involvement of the enteric nervous system.