i8 4 



NORMAL HISTOLOGY. 



The chief pancreatic duct, whose walls consist of a single layer of 

 unusually tall (12 /z) columnar epithelium and a tunica propria of compact 



Island of 

 Langerhans 



FIG. 228. Section of pancreas, showing general arrangement of lobules. X 30. 



fibre-elastic tissue, gives off numerous lateral interlobular branches, also 

 lined by a simple although lower epithelium. The canals springing from the 



Alveolus 



Interlobular 

 blood- 

 vessels and 

 nerve 



Fie. 229. Section of pancreas, showing interlobular tissue with vessels, nerve and duct and surrounding 



tubular alveoli. X 200. 



interlobular ducts enter the lobules, where they are lined by flattened epithe- 

 lial cells (3 /JL high) and correspond to intermediate and not to the usual 

 intralobular ducts. The latter being wanting, the uncommonly long inter- 



