Esophagus

Some articles on esophagus:

Supraesophageal Ganglion
... The supraesophageal ganglion lies dorsal to the esophagus and consists of three parts the protocerebrum (with eyes), the deutocerebrum (with antennae in insect), and the tritocerebrum ... The lobes of the tritocerebrum split to circumvent the esophagus and begin the subesophageal ganglion ... ganglion continues the nervous system and lies ventral to the esophagus ...
Schatzki Ring
... A Schatzki ring or Schatzki-Gary ring is a narrowing of the lower part of the esophagus that can cause difficulty swallowing (dysphagia) ... The narrowing is caused by a ring of mucosal tissue (which lines the esophagus) or muscular tissue ... and Schatzki rings are further subdivided into those above the esophagus/stomach junction (A rings), and those found at the squamocolumnar junction in the lower esophagus (B ...
Gut Motility - Esophagus
... After food is chewed into a bolus, it is swallowed and moved through the esophagus ... In the esophagus, two types of peristalsis occur ... wave, which occurs when the bolus enters the esophagus during swallowing ...
Upper Esophageal Sphincter
... (also called the pharyngoesophageal sphincter) refers to the superior portion of the esophagus ... During swallowing the upper esophageal sphincter opens so the bolus can pass into the esophagus ... role of the UES is to reduce backflow from the esophagus into the pharynx ...
Mollusca - A "generalized Mollusc" - Nervous System
... the gut are the cerebral ganglia, which sit above the esophagus (gullet) and handle "messages" from and to the eyes ... The pedal ganglia, which control the foot, are just below the esophagus and their commissure and connections to the cerebral ganglia encircle the esophagus in a nerve ring ... The brain, in species that have one, encircles the esophagus ...