PANCREAS OF THE PIG 

 (GROWTH OF THE PA^X:REAS 



221 



The earliest duct-injection figured in this paper is from an 

 embryo measuring 35 mm. (fig. 7). Although the whole organ 

 is not injected, the ducts in the head seem to be completely 

 filled. The picture is an unexpected one. There is no sign of 



Fig. 7 Pancreas and (iiiodenuni of a pig foetus 3o mm. long, ventral view. 

 The ducts in the head have been injected by forcing ink from the stomach (p. 

 211) and appear as a capillary plexus without a main channel (it is not necessary 

 to ligate the intestine in making these injections). D, duodenum; E, entrance of 



duct into liuodi'iuuii ; /''/. plexus of ducts. X 30. 



a main duct with branching arms, but instead the tubules form 

 a plexus, with frequent anastomoses at fairly regular intervals. 

 This plexus is connected with the intestine by a narrow tubule 



