ANATOMY OF THE PITUITARY BODY 



The pars glandularis. — Three types of cells are usually- 

 recognized in the pars glandularis (Schonemann, 1892): (i) 

 reserve cells (chromophobes, neutrophils, chief cells), (2) 

 oxyphilic cells (eosinophils, acidophils, a cells), and (3) baso- 

 philic cells (cyanophils, /3 cells) (see Figs. 6 and 7). Some- 

 times the cells are classified simply as reserve cells (chromo- 

 phobes) and chromophilic cells (oxyphils and basophils) 

 (Flesch, 1884). The reserve cells are characterized by a poor- 

 ly staining, homogeneous cytoplasm. The cytoplasm of the 

 chromophil cells appears to contain granules staining readily 







^^^<E/i^^ #^;s^i 



Fig. 6. — Cells of the pars glandularis of the woodchuck {Martfio!a mon^ix). 

 Mallory's stain. X 1,000. From Rasmussen (1921). 



with eosin (oxyphils) or with haematoxylin and other dyes, 

 usually but not necessarily basic (basophils). In the human 

 pituitary, the cytoplasmic granules of the oxyphils appear to 

 be coarser and more numerous than those of the basophils. 

 Some authors believe that at least the chromophils can also 

 be differentiated by the morphology of the Golgi body (Reiss, 

 1922). 



Cytogenesis in the pars glandularis. — In the rabbit (Yama- 

 kawa, 1933), sheep and ox (Aron, 1929; Zimmermann, 1931), 

 dog (Wolfe, Cleveland, and Campbell, 1933) and man 

 (Cooper, 1925; Roffo, 1933), the first chromophil cell to be 



[13] 



