Assertion: appendicular skeleton's bone | /r/MadeOf | bone marrow
Facets:
Source sentences:
text: The classification of a long bone includes having a body which is longer than it is wide, with growth plates (epiphysis) at either end, having a hard outer surface of compact bone and a spongy inner known as cancellous bone containing bone marrow.
text: Bones also contain bone marrow within the the hollow center shaft of bone (medullary cavity).