Assertion: upper endoscope | /r/HasProperty | passed through the mouth
Facets:
value: to visualize the esophagus
type: PURPOSE
Source sentences:
text: Upper endoscopes are passed through the mouth to visualize the esophagus (food pipe), stomach, and duodenum (first portion of the small intestine), while lower endoscopes (colonoscopes) are passed through the rectum to view the colon, or large intestine.