PATHOLOGY

Detailed explanation-1: -Esophagus: The esophagus is a muscular tube that connects the pharynx (throat) to the stomach. The esophagus contracts as it moves food into the stomach.

Detailed explanation-2: -Once the food bolus enters the esophagus passing the UES, a peristalsis wave carries the bolus down to stomach through the LES.

Detailed explanation-3: -The primary function of the esophagus is to transport food entering the mouth through the throat and into the stomach. This function begins at the very beginning of the esophagus, following some taste buds located on the organ, at the upper esophageal sphincter (UES).

Detailed explanation-4: -Structurally, the esophageal wall is composed of four layers: innermost mucosa, submucosa, muscularis propria, and adventitia. Unlike the remainder of the GI tract, the esophagus has no serosa.