ESOPHAGUS

=Esophagus= [image:http://i.imgur.com/hVJk1oz.gif] Also spelled Oesophagus, a muscular tube that connects the mouth to the stomach. A series of muscular contractions known as '''peristalsis''' pushes the food (bolus) down from the mouth to the stomach. Muscles contract behind the food while those ahead of the food relax.