SECT. 



! 93-] 



THE SUPRARENAL CAPSULES. 



4*3 



normally of line granules of a nitrogenous substance ; to which, 

 however, there arc almost always added separate fat-granules, and 

 these, in many cases (when the cortical substance is yellow), are pre- 

 sent in such numbers that they completely fill the cells, which then 



Fig. 175. 



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I 



From the suprarenal capsule of man. a. 

 five cells filled with pale contents from the 

 apex of a cortical cylinder; 6. pigment-cells 

 from tlie innermost lamina of the cortex ; c. 

 fatty cells, from a yellow cortical lamina; </. a 

 large cyst filled with fat from such a cortex 

 (gland-tube, Ecker) ; e. cells from the medul- 

 lary substance, some with processes. Mag- 

 nified 350 diameters. 



closely resemble the hepatic cells 

 of a fatty liver. In the brown 

 layer of the cortex, the cells are 

 completely filled with brown 

 pigment granules. 



The medullary substauce has 

 likewise its stroma of connective 

 tissue, which, as a continuation of 

 the cortical lamina?, traverses the 

 whole interior with delicate bun- 

 dles, and presents a net- work of 

 tolerably close, roundish meshes. 

 In these meshes lies a pale finely 

 granular substance, in which in 

 mau, I have almost always ob- 

 served on careful treatment, and 

 in fresh preparations, pale cells, 

 o*oo8'" to 0.016" in diameter. The contents of these cells are 

 finely granular, sometimes with a little fat or some pigment 

 granules; the cell-nuclei are frequently very beautiful, and have 

 large nucleoli. The form of the cells is angular, and they 

 occasionally exhibit processes from their sides, one or more in 

 number, and sometimes branching. All these circumstances 

 give these cells a strong resemblance to the nerve-cells of the 

 nervous centres, though the two cannot with certainty be re- 

 garded as identical. 



§ 193. Vessels and Nerves. — The blood-vessels of the suprarenal 

 capsules are numerous ; they lie in the stroma of connective tissue, 

 and form two kinds of capillary net- works — the one in the cortex 

 with elongated meshes, the other in the medulla with roundish 

 interspaces. The arteries arise as numerous small trunks from 

 the neighbouring larger arteries (from the phrenic, cceliac and renal 

 vessels, and from the aorta) ; they frequently number as many as 

 twenty, and are distributed in part by penetrating directly into 

 the medulla, partly by ramifying in the cortex. The latter vessels 

 are more numerous and much ramified ; they cover the outer 

 surface of the organ, and form a fine capillary net- work, even 



