Assertion: embryo | /r/CapableOf | attach to the ectoderm
Facets:
value: near the animal pole
type: LOCATION
Source sentences:
text: Secondary invagination involves the elongation of the archenteron across the blastocoel (the fluid-filled cavity of the blastula, as the embryo is known at this stage), where it attaches to the ectoderm near the animal pole (the pole nearest the nucleus) of the embryo.