Assertion: echinoderm's mouth | /r/HasProperty | form
Facets:
Source sentences:
text: If the blastopore forms an anus, it is called a deuterostome, meaning that the mouth (stoma ) forms second (deutero ) after the anus.
text: In the Deuterostomia, the reverse is true; the pocket edge develops into the anus, and the mouth is formed later.