INTERNAL PKOTECTIVE SECRETIONS 



43 



always, accompanied by hypertrophy and hyperplasia of the 

 pituitary body. 



XII. The Suprarenal Capsules or Adrenals are two epithelial 

 flattened bodies of a yellowish-brown colour, situated above the 



FIG. 10. A, Human suprarenal body ; vertical section. (Eberth). 1, cortical substance ; 2, 

 medullary substance ; a, capsule ; b, zona glomerulpsa ; c, zona fasciculate ; d, zona reticularis, 

 e, groups of medullary cells ; /, section of a large vein. B, cortex of dog's suprarenal ; vertical 

 section. (Bohm and v. Davidoff.) a, fibrous covering ; b, zona glomerulosa ; c, zona fasci- 

 culata ; d, zona reticularis. 



kidneys, each weighing about four grammes. They reach their 

 maximal development during in tra- uterine life. Their size 

 is considerable in proportion to that of the kidneys in the 

 foetus at term (Fig. 9). This fact, discovered by Meckel, was 

 confirmed for man by A. Ecker and H. Frey. It does not, how- 

 ever, signify (as Bischoff maintained) that the functions of the 

 suprarenals are in relation with embryonic life, since they would 



