Assertion: skull's bone | /r/MadeOf | fibrous connective tissue
Facets:
value: in the embryo
type: LOCATION
Source sentences:
text: In the embryo, the bones of the skull are first made of fibrous connective tissue, which is gradually replaced by bone matrix.
text: In the embryo, the bones of the skull are first made of fibrous connective tissue, which is gradually replaced by bone matrix.