THE ITU [TAB? BODY 





of the infundibulum, into which it may be traced. It is believed that 

 the active principle of the gland is represented by this material. < 

 blood supply of the pars nervosa is relatively Bcanty. 



Between the pars nervosa and the intraglandnlar cleft ab< 

 to is a layer of cells differing from those of either the anterior or the 

 posterior Lobe. This layer of cells constitutes the Bo-called part ini 

 media. The cells are somewhal like those of the pars glandulai sepl 



that they are distinctly granular, the granules being of the neutrophile 

 variety, thai is to say, they slain with neither hash- nor acid dyes. Well- 

 defined vesicles containing an oxyphile colloid material are often found 



f 



Fig, 196.- Drawing from a photogi i through th< . 'anu, 



of ■ human fetus < 5th month): ii 1a; c, third ventricle; d, e, infun- 



dibulum surround' ial cells; ;. para intermedia; g, intraglandular cleft; h. pars ne: 

 (Herring, from Howell's Physiology.) 



ii them. The blood supplj is much less abundanl than thai of the 

 pars glandularis. Although well separated by the cleft from the | 

 glandularis, the pars intermedia is not well separated from th< 

 nervosa, because many of its cells extend for some disl the lat- 



ter between the neuroglial fibers Certain of the cells in the pars i< I 

 media may lie seen in various stages of conversion into globular hyaline 

 bodies, or a granular mass of material may appear in them. In either 

 e, the cells ultimately break down. Betting Tree the hyaline or granular 

 material, which is believed to be the origin of the similar material al- 

 ready described as existing between the neuroglial fibers of tl • 



nervosa ami therefore ultimately finding its w a\ by the infundibulum 



