Assertion: chorion | /r/HasProperty | two-layered
Facets:
value: in this section
type: LOCATION
Source sentences:
text: In this section and those following, the chorion (C) is two-layered and the amnion (A) has one layer of ectodermal cells.
text: The chorion is a double-layered membrane formed by the trophoblast and the extra-embryonic mesoderm, which eventually will give rise to the fetal part of the placenta.