THE ADRENAL BODIES 



119 



chromaphil tissue frequently run close up to, and may even be 

 continuous with, the medullary substance of the adrenal. 



In some animals viz., monkey, pig, guinea-pig, rat, gopher, 

 and squirrel the present writer has been unable to discover 

 any chromaphil bodies. 



In regard to the microscopic structure of the chromaphil 

 bodies, a detailed description is not necessary. It is, however, 

 desirable to institute some comparisons between the histological 



cbld. c. 



end 2 



conn. t. 



bid. v. 

 chrom. c. 



bid. c. 



chrom. c. 



conn. t. 



FIG. 33. Transverse section through the abdominal chromaphil body of the 

 dog. Fixed in corrosive sublimate and stained with hsematoxylin. 

 Section 10 ^t in thickness. Leitz obj. 6. Drawing ocular. 



Lettering common to Figs. 33, and 34, bid. c., blood corpuscles ; bid. v., blood- 

 vessels ; c., capsule ; chrom. c., chromaphil cells ; col.c., columnar cells of 

 adrenal medulla ; conn, t., connective tissue ; end., endothelium of blood- 

 n., nuclei. 



appearances of the adrenal chromaphil tissue and this substance 

 as it occurs in other places, as, for example, in the sympathetic 

 ganglia and in the abdominal chromaphil bodies. These 

 comparisons refer to the structures in the dog. 



A comparison of Fig. 33 with Fig. 34 will show that the 

 general resemblance between extra -adrenal chromaphil tissue 

 and adrenal medulla is very great. Both consist of columns 

 of cells staining yellow or brown with bichromate of potash. 

 The cell columns are, however, for the most part much thicker 



