Assertion: bone's surface | /r/HasProperty | inner
Facets:
Source sentences:
text: Cortical bone is covered by a periosteum on its outer surface, and an endosteum on its inner surface.
text: The mastoid angle is truncated; it articulates with the occipital bone and with the mastoid portion of the temporal, and presents on its inner surface a broad, shallow groove which lodges part of the transverse sinus.