Assertion: gastropod's gill | /r/HasProperty | ctenidia
Facets:
Source sentences:
text: The pallial complex is a collection of structures at the roof of the mantle cavity and typically contains at least one pair of lamellate gills (ctenidia), a thick layer of glandular epithelium called mucus tracts or hypobranchial glands, and the outlets for the digestive, excretory, and reproductive systems.
text: Caenogastropods possess a gill (ctenidium) and a horny (flexible) or calcareous operculum, or “trap door,” which is pulled in after the foot to protect the animal.
text: Typically, at least in the more primitive members of each group, there are one or more pairs of gills (called ctenidia) which lie in a posterior cavity (the pallial cavity) or in a posterolateral groove surrounding the foot.