Assertion: skull's bone | /r/PartOf | the face
Facets:
Source sentences:
text: The mandible is one entire bone but the cranium is further divided into subcategories of bones, including the cranial vault or upper portion of the skull, the cranial base which is the inferior portion of the skull, the cranial cavity, also known as the interior of the skull, the bones that make up the face and are called the facial skeleton and lastly, the acoustic skeleton or ear ossicles.