two different substructures of the ependymal and the hypendymal sco-cells display a positive immunocytochemical reaction : ( 1 ) sacs containing flocculent secretion , which originate from the granular endoplasmic reticulum , and ( 2 ) vacuoles filled with fine granular secretion , which are pinched off from the golgi apparatus .
C0007634
cells
C0018042
golgi apparatus