the results reveal that the label is incorporated into two types of osteogenic cells : ( a ) a spindle cell type ( a cells ) with characteristics generally associated with matrix production , including an extensive development of the endoplasmic reticulum and the presence of large intracellular accumulations of a dense , finely granular material , morphologically identifiable as glycogen ;
C0007634
cells
C0014239
endoplasmic reticulum