Assertion: echinoderm | /r/HasAspect | mouth
Facets:
Source sentences:
text: Generally speaking, echinoderms have a mouth, esophagus, stomach and intestine, and they may or may not have an anus.
text: There are exceptions to this plan however; some echinoderms lack an anus and others, like the crinoids, have both the mouth and the anus on the same side of the body.