Assertion: periosteum's cell | /r/CapableOf | prevent the bone shell
Facets:
value: from becoming too thick
type: TRANSITIVE-OBJECT
Source sentences:
text: Even as new bone is laid down by osteoblasts beneath the periosteum, cells called “osteoclasts” digest bone tissue from the inside, widening the bone’s internal marrow-containing cavity and preventing the bone shell from becoming too thick.