THE ANTERIOR LOBE OF THE PITUITARY BODY. 



1807 



laries, the meshes of which are occupied by spherical or cord-hke masses of cuboidal 

 or polygonal epithelial cells. The latter are principally of two kinds, — the smaller 

 and slightly staining chief cells, from .003 -.004 mm. in diameter, and the larger and 



Fig. 1530. 



Interlobar septu 



Posterior or cerebral lobe 



-Blood-vessel 



.Anterior or 

 oral lobe 



Connective-tissut -^V' 

 trabecula \ 



■■T~r^ ' apsule 

 Transverse section of pituitary body, showing relation of anterior (oral) and posterior (cerebral) lobes. X 7. 



deeply staining chromophile cells (.005-. 008 mm.), so called because of their marked 

 affinity for certain dyes. The two varieties of cells are arranged as intervascular 

 anastomosing cords, in which, in a general way, the acidophilic cells occupy the 

 periphery and the basophilic ones the centre. A third variety of cells, clear large 

 elements, are found especially in the pars intermedia. 



The aggregations of the cells, cord-like or spherical in form and usually without 

 distinct lumen, lie in very close relation to the wide capillary blood-vessels that 



Chief cells 



Chief celN 



Capillar> 



Colloid 



Capillary 



Chromophile cells 



1 

 Section of anterior lobe of pituitary body; three acini contain colloid material. X 250. 



ramify between them, supported by the delicate connective-tissue septa. Here and 

 there, however, the glandular epithelium surrounds a lumen which may contain 

 colloid material, thus resembling the acini of the thyroid body. The colloid-contain- 



