Assertion: echinoderm's mouth | /r/HasProperty | aligned
Facets:
Source sentences:
text: This means that their gastrovascular cavity, tentacles, and mouth are aligned such that if you were to draw an imaginary line through the center of their body, from the top of their tentacles through the base of their body, you could then turn the animal about that axis and it would look roughly the same at each angle in the turn.