brane elements arranged in more or less parallel fashion (Figures 3-30 

 and 3-31). Present evidence suggests that this complex is a separate 

 organelle of the cytoplasm and not a part of the endoplasmic reticulum. 

 In support of this view, the following facts may be cited: ( 1 ) The mem- 



Figure 3-31. Electron Micrograph of Golgi Complex in Primary Sper- 

 matocyte of Japanese Viviparid Snail, Vivipariis. The Golgi complex appears 

 as an array of parallel smooth-surfaced membranes enclosing a number of 

 membrane-bound vesicles of variable size. (From PoUister, A. W. and Pol- 

 lister, P. F., 1957. "The Structure of the Golgi Apparatus," Intern. Rev. 

 CytoL, 6, Fig. 6b, p. 101.) 



brane system has no associated granules; (2) the general morphology 

 of the complex is remarkably similar in cells of very diverse types; (3) 

 the membranes, although resembling certain elements of the endoplasmic 

 reticulum, are markedly thicker; and (4) the complex appears to be 

 specifically capable of reducing osmium tetroxide. There is some evi- 



STRUCTURE AND FUNCTION OF CYTOPLASMIC ORGANELLES / 63 



