Assertion: amnion | /r/HasProperty | tough extraembryonic tissue
Facets:
Source sentences:
text: They showed that once the cells attached themselves to this substrate, they began to differentiate into hollow cysts composed entirely of amnion - a tough extraembryonic tissue that holds the amniotic fluid.
text: They showed that once the cells attached themselves to this substrate, they began to differentiate into hollow cysts composed entirely of amnion -- a tough extraembryonic tissue that holds the amniotic fluid.