190 



THE ESSENTIALS OF HISTOLOGY. 



(zona fasciculata, c). Immediately underneath the capsule, however, 

 the groups are more rounded (zona glomerulosa, /;), whilst next to the 

 medulla they have a closely reticular arrangement (zona reticularis, d), 

 and a similar disposition both of the cells and the connective tissue is 

 noticeable throughout the medulla. 



The cells which form the rounded groups and columns of the cortical 

 substance are polyhedral in form (fig. 224, A); each contains a clear round 

 nucleus, and there are often yellowish oil-globules in their protoplasm. 



FIG. 224, A. CELLS AND CELL-GROUPS FROM 



/ j THE OUTERMOST LAYER OF THE CORTICAL 



SUBSTANCE OF THE SUPRARENAL BODY. 



FIG. 223. VERTICAL SECTION OF SUPRA- (Eberth. ) B. A SMALL PORTION OF THE 

 RENAL BODY. (Magnified.) (Eberth.) MEDULLARY PART OF THE SUPRARENAL 



1, cortical substance; 2, medullary sub- CAPSULE OF THE OX. (Eberth.) 



stance : a, capsule ; 6, zona glomerulosa : 



c, zona fasciculata ; d, zona reticularis ; e , 



groups of medullary cells ; /, section of a 



large vein. 



No blood-vessels penetrate between these cells, both the blood-vessels 

 -and lymphatics of the cortex running in the fibrous septa between the 

 columns ; the lymphatics are said to communicate with fine spaces 

 which run between the cells of the columns. 



The cells of the medulla (fig. 224, B) are more irregular in shape, and 

 are often branched. Their protoplasm is either clear, or it may in some 



