what does an esophagus so in a fish
The esophagus takes the food from the mouth to the stomach. Food moves through the esophagus by peristalsis, which is muscle contractions the pushes the food downward. At the â¦ end of the esophagus is the lower esophageal sphincter (LES), which prevents food from re-entering the esophagus after it's reached the stomach.