And what the epiglottis basically does is it prevents the food products from actually going into our windpipe. If the food products were to go into the windpipe we would basically choke. So the pharynx connects the oral cavity and the nasal cavity to the esophagus. And the windpipe, a structure called the epiglottis prevents food from going into the wrong tube into our windpipe. Now the stophagus basically carries that food bolus from our oral calvary to our stomach and the process that ultimately carries that allows the movement of the food is known as peristalis. And we'll see what this is in a future lecture.