👉 The esophagus, also known as the stomach, is a muscular tube that connects the mouth to the small intestine. It is divided into two main parts: the esophagus and the stomach. In humans, the esophagus has four segments: the lower esophageal sphincter, the middle esophageal sphincter, the upper esophageal sphincter, and the gastroesophageacarynchial valve. The lower esophageal sphincter is
