Assertion: skull's sinus | /r/CapableOf | form through excavation of bone
Facets:
value: from the nasal cavity
type: TRANSITIVE-OBJECT
value: by air-filled sacs
type: MANNER
value: developmentally
type: MANNER
Source sentences:
text: The paranasal sinuses form developmentally through excavation of bone by air-filled sacs (pneumatic diverticula) from the nasal cavity.