Assertion: embryo's cell | /r/HasProperty | the germ layers
Facets:
Source sentences:
text: The gastrula with its blastopore soon develops three distinct layers of cells (the germ layers) from which all the bodily organs and tissues then develop:
text: Soon after the gastrula is formed, three distinct layers of cells (the germ layers) from which all the bodily organs and tissues then develop.