Assertion: sea urchin's system | /r/HasProperty | a = anus
Facets:
Source sentences:
text: a = Digestive and circulatory systems of a regular sea urchin:a = anus ; m = madreporite ; s = aquifer canal ; r = radial canal ; p = podial ampulla ; k = test wall
text: a = Digestive and circulatory systems of a regular sea urchin:a = anus ; m = madreporite ; s = aquifer canal ; r = radial canal ; p = podial ampulla ; k = test wall