Assertion: bronchus's wall | /r/HasProperty | thin
Facets:
value: very
type: DEGREE
value: to permit the exchange of gases
type: PURPOSE
Source sentences:
text: The wall of the trachea is thin while the walls of bronchi are comparatively thick due to increasing amounts of smooth muscles.
text: The walls of the alveoli and the blood capillaries are very thin to permit the exchange of gases.