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The endoscopist who examines the esophagus evaluates a muscular tube whose primary function is to convey swallowed material from the mouth to the stomach. The esophagus is approximately 25 cm in length measured from its origin in the neck just below…

The esophagus is a muscular tube that starts as the continuation of the pharynx with the upper esophageal sphincter (UES), or cricopharyngeus, and ends with the lower esophageal sphincter at the fundus of the stomach. Knowledge of the anatomy of…