Assertion: endosteum's osteoblast | /r/CapableOf | contribute to the bone repair
Facets:
value: by forming a soft periosteal callus
type: MANNER
Source sentences:
text: After a bone fracture, the progenitor cells in the cambium develop into osteoblasts and chondroblasts that contribute to the bone repair and healing by forming a soft periosteal callus .