Assertion: trachea's structure | /r/HasProperty | protected
Facets:
value: to external stresses
type: CAUSE
value: well
type: DEGREE
Source sentences:
text: The structures in the tracheobronchial tree are well protected, so it normally takes a large amount of force to injure them.
text: Hyaline provides a strong, yet flexible structure that maintains an open airway and is resistant to external stresses.