88 



PHYSIOLOGY 



CHAP. 



ductulcs within the pancreatic alveoli: like the, salivary glands, 

 they stain a uniform black. As shown iu Fig. 28, the excretory 

 duct sends lobular branches to these ductules between the cells, 

 and also to the interior of each cell. 



The blood- vessels penetrate into tbe gland along with the 

 pancreatic duct, ramify in the lobes, and form a capillary network 







FIG. 28. Section of two fragments of human pancreas. Silver eliminate method. (E. Miiller.) 

 A, longitudinal section of excretory duct, lined with columnar epithelium ; m, lobular 

 diir.tules, giving off small diverticula between and into the alveolar cells. B, .shows com- 

 mencement of ductules in alveolar cells (higher magnification). 



round the lobules and the alveoli with highly uneven meshes, 

 some being so wide that many parts of the alveoli are scantily 



irrigated with blood. 



The pancreas contains nerve fibres, both medullated and 

 non-medullated, which unite with the sympathetic ganglia and 

 the isolated ganglion cells. On staining with Golgi's method 

 the fine nerve-fibrils can be followed into the alveoli. In some 



