Assertion: echinoderm's arm | /r/MadeOf | radial canal
Facets:
Source sentences:
text: Each arm contains a radial canal (or one of its branches), but it does not contain body organs.
text: Each arm contains a radial canal (or one of its branches), but it does not contain body organs.
text: Each arm contains a radial canal (or one of its branches), but it does not contain body organs.