314 



PRACTICAL HISTOLOGY. 



[XXVIII 



(6.) Note the trabeculse of connective tissue bounding wide 

 spaces in the cavernous part. The whole is surrounded by a 

 tough capsule, in which, dorsally, are sections of blood-vessels one 

 vein (DV) and two arteries (DA) and nerves (fig. 304, N). 



SUPRARENAL CAPSULE. 



It is well to remember that there are great variations in the 

 structure of this gland in different animals. The suprarenal 

 capsule is a ductless gland, consisting of a cortical zone and a 



Zona glomerulosa. 



Z. fasciculata. 



Z. reticularis. 



Strands of cells of 

 the medulla. 



T.S. of a nerve. 



Ganglion ic cells. 



T.S. bundles of 

 smooth muscle. 



T.S, vein. 



N Medulla. 



FIG. 305. T.S. Human Suprarenal Capsule, x 50. 



medulla. It is invested by a fibrous capsule which sends septa 

 into the gland. Especially in the cortex, these septa run so as to 

 give a columnar arrangement to the cells which lie between them. 

 The parenchyma of the organ consists of cells which vary in their 

 characters in different regions. The cells of the cortex (15 /x) are 

 polyhedral, nucleated, granular, yellowish-coloured cells, arranged 

 under the capsule in rounded groups zona glomerulosa. Next 

 this is the widest zone the zona fasciculata. Next the medulla 



