Assertion: mollusk's organ | /r/HasProperty | gill
Facets:
Source sentences:
text: The main organs involved with the release of this excess ammonium are the gills.
text: All molluscs have a well developed excretory system and it is in the respiratory system that there are great adaptations: in aquatic animals, the exchange of gases is carried out through the surface of the body, as in other lower invertebrates, also developing specialized respiratory organs, called gills (ctenidia), which reach a singular development in nudibranchs; in some terrestrial snails and freshwater it is the mantle that has a similar function to a respiratory lung.