NORMAL HISTOLOGY. 



or mesogastrium, sending out hollow buds and lateral branches. 

 The organ first lies parallel to the sagittal axis of the body, afterwards 

 changing its position so as to lie transversely, the former anterior ex- 

 tremity passing to the left. In many mammals ventral diverticula 

 appear in addition to the dorsal outgrowth : to what extent these are 

 formed in man, and to which portions of the organ they contribute, is 

 still uncertain. The presence of more than one pancreatic duct in cer- 

 tain animals is explained by the persistence of the embryonal condition. 

 The tubular acini of the organ are developed in a manner similar to 

 that in which those of the other salivary glands are formed : the 

 cylinders of entodermic cells send off branches, which, in turn, give 

 rise to secondary buds, the lumen of the original diverticulum ex- 

 tending into the terminal compartments of the gland. The ingrowth 

 of the surrounding mesoderm establishes the division into lobules 

 and supplies the interlobular connective tissue. 



