SUPRARENAL GLANDS. 



333 



Elastic fibers are 

 medulla but they 

 or absent in the 



FIG. 



characteristic is an affinity for chromic acid or chromium salts, by which 



they are colored brown. Similar 



cells occur in some sympathetic 



ganglia and in the glomus carot- 



icum. 



The capsule of the supra- 

 renal glands is connective tis- 

 sue, said to contain smooth mus- 

 cle fibers, blood and lymphatic 

 vessels, nerves and small gang- 

 lia. It sends prolongations into 

 the interior, 

 found in the 

 are very few 

 cortex. 



The arteries divide in the 

 capsule into many small branches 

 which penetrate the cortex and 

 there form a long-meshed cap- 

 illary network; toward and 



within the medulla the meshes become round. Some arteries pass 

 directly from the capsule to the medulla, without branching in the 



cortex. The larger of 



^^^ the numerous veins which 



arise in the medulla are 

 accompanied by longitu- 

 dinal bundles of smooth 

 muscle fibers. Before 

 leaving at the hilus they 

 unite to fprm the supra- 

 renal vein. Lymphatic 

 vessels have been record- 

 ed in the capsule and 

 medulla. 



The numerous 

 mostly non-medulla ted 

 nerves, of which a 

 human suprarenal gland 



Cell of the 

 medulla. 



388. FROM A SECTION OP THE SUPRARENAL 

 GLAND OP AN ADULT. X 360. 



Artery. 3 



Long meshed 

 capillary net 

 of the cor- 

 tex. 



r Round meshed 

 net of the 

 medulla. 





Vein of the _ _ _ ..... ----- 



medulla. 



FIG. 389. FROM AN INJECTED SECTION OF THE SUPRARENAL 



X 50. 



GLAND OF A CHILD. 



receives about thirty 

 small bundles, proceed 

 chiefly from the coeliac plexus and pass with the arteries from the capsule 



