Assertion: periosteum's layer | /r/MadeOf | numerous blood vessels
Facets:
Source sentences:
text: The fibrous membrane that forms the covering of bones except at their articular surfaces; consists of a dense external layer containing numerous blood vessels and an inner layer of connective tissue cells that function as osteoblasts when the bone is injured and then participate in new bone formation.
text: It consists of a dense external layer containing numerous blood vessels and an inner layer of connective tissue cells that function as osteoblasts when the bone is injured and also participate in new bone formation.