Assertion: bone marrow's cell | /r/CapableOf | line ventricle
Facets:
value: directly
type: MANNER
Source sentences:
text: These studies and other leave open the question of whether cells that directly line the ventricles—those in the ventricular zone—or cells that are at least a layer removed from this zone—in the subventricular zone are the same population of CNS stem cells.