Assertion: mollusk's gill | /r/AtLocation | the wall of the mantle cavity
Facets:
Source sentences:
text: Gills (ctenidia) are attached to the wall of the mantle cavity and are serviced by large blood vessels, each with its own heart.
text: Gills (ctenidia) are attached to the wall of the mantle cavity and are serviced by large blood vessels, each with its own heart.