Assertion: embryo's development | /r/HasProperty | the blastula
Facets:
Source sentences:
text: The development of an embryo passes through various stages: the blastula, a hollow ball of cells; the gastrula, migration of cells; morphogenesis; tissue differentiation, and so on.
text: The development of an embryo passes through various stages: the blastula, a hollow ball of cells; the gastrula, migration of cells; morphogenesis; tissue differentiation, and so on.