Asked in Digestive System
How does food move through the esophagus?
February 09, 2013 4:05PM
Saliva in the mouth moistens the food, while mastication
(chewing) breaks the food into pieces. These enter the esophagus
where gravity, the circular action of sliding against smooth
muscle, and slight peristalsis moves the food into the stomach.
Peristalsis is similar to gentle waves within the muscle walls of
the esophagus. Peristalsis only and always moves in one direction:
downward. Peristalsis in the intestines is stronger.
gravity my friend. gravity.