Assertion: stingray's body | /r/MadeOf | cartilage
Facets:
Source sentences:
text: Stingrays are fish with wide flat bodies made of cartilage, which is the same material that make up your ears.
text: They both hunt using electromagnetic pores, and their bodies are made of the same cartilage.
text: We are first introduced to the facts: sting rays are fish - `some of the coolest fish in the sea' - and have flat round bodies made of cartilage, eyes on top of their bodies that allow them to see even when buried (practically) in the sand, spiracles behind their eyes for breathing when their bottom side gills are flat against the sand, their mouth and nostrils are on the bottom of their bodies, and tails that protect them by being sharp and containing venom.