Assertion: oropharynx's border | /r/DefinedAs | pharyngeal isthmus
Facets:
value: an opening that leads
type: OTHER
Source sentences:
text: The inferior border of the nasopharynx is defined as the pharyngeal isthmus, an opening that leads into the oropharynx formed by the back of the soft palate and the posterior wall of the pharynx.