Assertion: amnion's cell | /r/CapableOf | fill the space
Facets:
value: between heuser's membrane
type: LOCATION
value: between the trophoblast
type: LOCATION
Source sentences:
text: During formation of the primitive yolk sac, some of the migrating hypoblast cells differentiate into mesenchymal cells that fill the space between Heuser's membrane and the Trophoblast, forming the extraembryonic mesoderm.