Fig. 1.2.10. Partial graphic reconstruction (i.e. manually shaded serial contour tracings) of the perinuclear envelope (asterisk) with apparent pores and a continuity (arrow) with the system of channels and cisterns of the endoplasmic reticulum (ER - ribosomes omitted). P - plasma membrane of a neuronal perikaryon. Scale = 400 nm. (Mouse, neocortex). Download the high resolution image.