396 THE DIGESTIVE SYSTEM 



On approaching its termination the lining cells of an intercalary 

 duct are still more flattened and often aicfquire a considerable breadth. 

 They are elongated in the direction of the Jong axis of the tubule, and in 

 surface view have an irregularly polygojnkl outline (Bensley). They 

 pass into the acini in a peculiar manner. 1 Instead of offering a direct 



FIG. 367. DRAWING OF AN INTERCAL- 

 ARY DUCT OF CAT, WITH THREE 

 BRANCHES ENDING IN ACINI TO 

 FORM CENTRO-ACINAL CELL GROUPS. 



The acinar cells contain numerous 

 basal filaments. X 750. 



transition 

 the form 



the duct epitheliun 



ear as if 



acinus. Thus 

 and consequently the 

 with those of tfie in 

 of tke^acinus^ atid are 

 cells by the secretory 

 municafton with the 



ce Is (of 



-acinal ce 

 .acts 



;iy separate 

 illaries whi 



imen of the 



characteristic of the pancreatic acini 

 The Acini. The acini of thelpar\< 



to tha 



telescot sd into the lumen of the 



duct. 



FIG. 368. RECONSTRUCTION 

 MODEL OF THE HUMAN 

 PANCREAS. 



The intralobular duct gives 

 off long intercalary ducts, 

 which, after branching, end 

 in the acini. X 344. (After 

 Maziarski.) 



of the acinus the cells of 



angerhans) are produced, 



s corre ;pond closely in appearance 



They seem to occupy lhe_J[umen 



from 1 ef distal ends of the acinal 



place he secreting cells in com- 



%e centro-acinal cells are 



ficreas possess an irregular tubular 

 ions. Their lining epithelium 



