Assertion: cuttlefish's cavity | /r/MadeOf | gill
Facets:
Source sentences:
text: The mantle cavity has muscular walls and contains the gills; it is connected to the exterior by a funnel or siphon.
text: On the functionally ventral part of the body is an opening to the mantle cavity, which contains the gills (ctenidia) and openings from the excretory, digestive and reproductive systems.