GOLGI MliMBRANES 



>'S 



Fig. I. Electron micrograph of the Golgi region of an epithelial cell in the rat epididymis. 

 A portion of the nucleus (N) appears at the bottom. A pair of cell membranes runs obliquely 

 across the upper left corner. The free surface of the cell is not shown but is toward the top. 

 Parallel arrays of Golgi membranes (GM) are interspersed througliDUt the central part of the 

 field and may be continuous in places outside the plane of section. Numerous small vesicles (v) 

 as well as larger vacuoles with electron-lucent interiors (v) appear in association with the 

 regularly arranged membranes. Towards the lower right and outside of the main Cjolgi zone 

 appear ergastoplasmic membranes (ER) studdeil witii small dense rihonucleoprotein particles, 

 as well as many mitochondria (M). S denotes a large granule that is possibly secretory in 

 nature. Fixative, i per cent osmium tetroxidc. In this figure the bar at the lower right repre- 

 sents 1 micron. X 23,850. 



