CELL ORGANS 



[CH. 



may also be made visible by prolonged treatment with 

 osmic acid. It consists either of a network or a system of 

 rods in the neighbourhood of the nucleus, but associated 

 especially with the dense protoplasm known as archoplasm 

 which surrounds the centrosome. In epithelial cells the net- 

 work seems constantly to lie in the side of the cell towards 

 the free surface of the epithelium. In nuclear division the 

 network becomes broken up into its component rods, and 

 these are distributed between the two daughter cells and 



FIG. 2. Golgi apparatus in epidermal cells, 

 after DEINECKA. 



a. Golgi network beside the nucleus in cell of horse. 



b. Skin of cat, with Golgi network beside the nuclei 

 of resting cells, and broken into small rods around 

 the mitotic figure in the large central cell. 



again become arranged around the centrosomes. In some 

 cells the Golgi elements may take the form of granules 

 ("dictyosomes") which are recognisable by their staining 

 reactions, and which multiply by division like the mito- 

 chondrial bodies ; and in some eggs in which Golgi granules, 

 mitochondrial bodies, and yolk-spherules are mingled to- 

 gether, they may be centrifuged apart into layers distin- 

 guishable by their colour, or may even exist in distinct 

 regions in the normal egg. About the true nature and func- 



