So as the tongue and other voluntary muscles found in the mouth initiate the process of swallowing wing, this reflex creates the movement of that epiglottis and the epiglottis basically shuts close and that prevents the movement of our bolus into our air passageway into the larynx. Now, we have a special type of circular muscle that basically connects, that separates our esophagus as well as the pharynx and this is known as our esophageal sphincter. And this esophageal sphincter relaxes and opens and allows the movement of that bolus into our esophagus. So now let's move on to our esophagus. So the esophagus is a relatively long and relatively narrow passageway, a cylindrical passageway that allows the movement of our bolus, the food from the pharynx and into our stomach. So the esophagus is a relatively long and narrow passageway that connects the pharynx to our stomach.