Assertion: fin whale's plate | /r/MadeOf | keratin
Facets:
Source sentences:
text: Each plate is made of keratin that frays out into fine hairs on the ends inside the mouth near the tongue.
text: Each plate is made of keratin that frays out into fine hairs on the ends inside the mouth near the tongue.
text: Each plate is made of keratin that frays out into fine hairs on the ends inside the mouth near the tongue.
text: Instead, they have a system of fringed plates made of keratin (fingernail-like material) that filter out prey rather than tearing it apart.