Assertion: inner ear's cochlea | /r/HasProperty | covered by thin layer of bone
Facets:
value: very
type: DEGREE
Source sentences:
text: The cochlea is a membranous tube that is covered by a very thin layer of bone and wound around a tiny central bone (the modiolus) into a shape that resembles a snail; it is only about nine millimeters across - well under one-half inch.