Assertion: bone's layer | /r/CapableOf | lie down new bone
Facets:
value: on the sides of the channel
type: LOCATION
Source sentences:
text: Layers of bone-forming cells, or osteoblasts, follow the osteoclasts and lay down new bone on the sides of the channel; the layers of bone built up in this way slowly narrow the channel until a tunnel not much larger than the central blood vessel remains.