Assertion: embryo | /r/CapableOf | form the chorion
Facets:
value: with its chorionic villi
type: OTHER
Source sentences:
text: The fact that an embryo in both placental mammals and marsupials undergoes the process of implantation, and forms the chorion with its chorionic villi, and later the placenta and umbilical cord, is also a difference from lower chordates.