Assertion: gill's filament | /r/MadeOf | small number of stem cells
Facets:
value: for each lineage
type: TRANSITIVE-OBJECT
value: very
type: DEGREE
Source sentences:
text: We believe that this is due to the fact that the filaments contain a very small number of stem cells for each lineage, and their high proliferative activity dilutes any label that stem cells can acquire during the BrdU treatment.