Assertion: skull | /r/MadeOf | air-filled cavities
Facets:
Source sentences:
text: The skull also contains sinuses, air-filled cavities known as paranasal sinuses, and numerous foramina.
text: The skull contains air-filled cavities called sinuses.
text: The skull also contains sinuses, air-filled cavities known as paranasal sinuses, and numerous foramina.