Assertion: lizard's scale | /r/MadeOf | keratin
Facets:
Source sentences:
text: As in other reptiles, the skin of lizards is covered in overlapping scales made of keratin.
text: Lacerta agilis, showing overlapping Skin of, showing overlapping scales made of keratin
text: As in other reptiles, the skin of lizards is covered in overlapping scales made of keratin.
text: The scales are made of keratin; the same material out of which our fingernails are made.