Which structural mechanisms help the passage of large masses of food through the esopagus?

The passage of large masses of food through the esophagus is facilitated by peristalsis, a coordinated wave-like contraction of the esophageal muscles that propels food toward the stomach. The esophagus also features a lower esophageal sphincter, which relaxes to allow food to enter the stomach and prevents backflow. Additionally, the presence of mucus along the esophageal lining aids in lubricating food and minimizing friction during transit.