dx ketooccurs here. A chemical breakdown of food, including carbohydrates, begins in the mouth.Throat: This membranous muscle is located around the neck and connects the mouth and nostrils with the esophagus and larynx. It allows air and food to be passed through a valve called the epiglottis.Esophagus: This is the canal that connects the pharynx with the stomach. Its muscular walls contract and relax in a downward direction, allowing digested food to pass through. It is very delicate http://www.skiingsquirrel.com/
