The alimentary canal, also known as the digestive tract, is a long tube-like structure that runs from the mouth to the anus. It is composed of several organs, including the enteron (7 letters) and the GUT (3 letters). The enteron is the most primitive part of the digestive system and is responsible for the absorption of nutrients. The GUT is the main organ of digestion and is composed of the stomach, small intestine, and large intestine. Together, these organs work to break down food, absorb nutrients, and eliminate waste.