Assertion: echinoderm's mouth | /r/HasProperty | stoma
Facets:
Source sentences:
text: If the blastopore forms a mouth, the embryo is a called a protostome, meaning that the mouth (stoma ) forms first (proto ) after the anus.
text: If the blastopore forms an anus, it is called a deuterostome, meaning that the mouth (stoma ) forms second (deutero ) after the anus.