The Alimentary Canal

The mouth is the first portion of the alimentary canal, which receives and mechanically breaks down food, and produces saliva.

The pharynx is part of the digestive and respiratory systems and consists of three main parts: nasopharynx, oropharynx, and laryngopharynx.

The esophagus is a muscular tube through which food passes from the pharynx via peristalsis to the stomach.