Assertion: ileum's fold | /r/HasProperty | permanent
Facets:
Source sentences:
text: The circular folds, termed valvulae conniventes, are permanent; they begin in the second part of the duodenum and extend throughout the small intestine.
text: These mucosal and submucosal folds are permanent structures, varying from 3 to 10 mm in height and running transversely around the small intestine.