The gastroesophageal junction is the area where the esophagus meets the stomach. This junction plays a crucial role in digestion, allowing food to pass from the esophagus into the stomach while preventing stomach contents from flowing back up. This region is surrounded by a ring of muscle known as the lower esophageal sphincter. This sphincter helps maintain a one-way flow of food and liquids, ensuring that the stomach's acidic environment does not irritate the esophagus. Proper function of the gastroesophageal junction is essential for digestive health.