CHAPTER V 



THE GOLGI MATERIAL 



A characteristic constituent of animal cells is the Golgi material. 

 Interest in this substance has recently been stimulated anew by sugges- 

 tions concerning its possible relation to certain components of plant 

 cells. ^ 



Occurrence and General Characters. — In 1898 Golgi, using a modifi- 

 cation of a method devised by Cajal for the study of nervous tissue, 



lU/ 



Fig. 35. — The Golgi material in animal cells of various types, a, spinal ganglion cell 

 of rabbit. {After Golgi, 1899.) h, erythroblast of guinea pig, fixed in formalin and potas- 

 sium bichromate, c, the same, fixed in osmic acid. (Jb and c after E. V. Cowdry, 1921.) 

 d, fat cell from human skin. (After Deineka, 1912.) e, cell from pancreas of cat. /, 

 epithelial cell from prostate gland of dog. g, cartilage cell from cat. (e-g after von Bergen, 

 1904.) h, red blood corpuscle of frog, prepared by Golgi's silver impregnation method. 

 {After Sinigaglia, 1910.) 



found in the Purkinje cells of the barn owl's brain a structure which he 

 called the "internal reticular apparatus." It consisted of a closed net 

 of fine fibrils in a rather definite region of the cytoplasm between the 

 nucleus and the cell surface. Subsequent investigation of a great 

 variety of tissues from many animals showed the "Golgi apparatus" 

 to be of general occurrence although varying considerably in form (Fig. 

 35). After the customary methods it commonly appears as a network 



1 For general accounts, see von Bergen (1904), Duesberg (1914a6), Cajal (1914), 

 Pappenheimer (1916), E. V. Cowdry (19236, 1924a), Nath (1926), Kopsch (1926) on 

 human tissues, King (1927) on Protozoa, W. Jacobs (1927), and Bowen (1926c;', 

 1929d). For flagellates, see Hall (1929) and literature there cited; also later papers 

 of Hall on Protozoa. For microtechnical methods, see Lee (1921), Pappenheimer 

 (1916), and Bowen (19286-gf). Valuable literature lists are given by Duesberg 

 (1914a), Cowdry (1924a), and Bowen (1929d). 



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