Assertion: skull's bone | /r/HasProperty | ossified in membrane
Facets:
value: from a single center
type: LOCATION
Source sentences:
text: The parietal bone is ossified in membrane from a single center, which appears at the parietal eminence about the eighth week of fetal life.
text: The frontal bone is ossified in membrane from two primary centers, one for each half, which appear toward the end of the second month of fetal life, one above each supraorbital margin.