348 



DUCTLESS GLANDS. 



globules, each cell being provided with a nucleus. Just beneath 

 the capsule these cells form the zona glomerulosa and zona fascicu- 

 lata, and still deeper, the zona recticularis. 



In the medulla the fibrous stroma is arranged so as to form 

 bundles around the veins, which are very numerous in this portion 

 of the gland. In the spaces are irregular, granular cells, some 



Capsule. 



Zona glomerulosa. 



Zona fasciculata. 



Zona reticularis. 



FIG. 190. Section of suprarenal cortex of dog ; X 120 (Bohm and Davidoff). 



of which are branched ; these are stained brown by chromic acid,, 

 and the material taking the stain is called a chromogen. 



The arteries supplying the suprarenal capsules are derived 

 from the aorta, phrenic, and renal, and break up into capillaries 

 in the septa of the cortical portion, which discharges its veins in 

 the medulla, finally becoming the suprarenal vein, which on the 

 right side enters the inferior vena cava, and on the left the renal 

 vein. The nerves are derived from the solar and renal plexuses,. 



