Assertion: echinoderm's system | /r/CapableOf | open to the exterior
Facets:
value: typically
type: DEGREE
value: through an opening
type: MANNER
Source sentences:
text: This system varies between different classes of echinoderm but typically opens to the exterior through a sieve-like madreporite on the aboral (upper) surface of the animal.
text: This system typically opens to the exterior through an opening known as the madreporite, which is connected to the mouth.