Assertion: esophagus's sphincter | /r/HasProperty | a zone of high pressure
Facets:
Source sentences:
text: The lower esophageal sphincter is a zone of high pressure 3 to 4 cm long at the lower end of the esophagus1 and does not correspond to any visible macroscopic anatomic landmark either on the external surface of the esophagus, nor in the endoscopic appearance of the mucosa.