Chap. XXVI.] 



THE PANCREAS. 



209 



part of the latter, is a continuous layer of gland tissue 

 in the submucosa, composed of convoluted, more or less 

 branched tubes grouped into lobules, and permeated 

 by bundles of non-striped muscular tissue, outrunners 

 of the muscularis mucosae. These are the glands of 

 Brunner. Numerous thin ducts lined with a single 

 layer of columnar epithelial cells pass through the 

 mucosa, and open into the crypts of Lieberkiihii be- 

 tween the bases of the villi. The gland tubes of 

 Brunner's glands are identical in structure with the 

 pyloric glands, with which they form a direct ana- 

 tomical continuity. 



276. The pancreas (Fig. 122) is in most respects 

 identical in struc- 

 ture with a serous 

 or true salivary 

 gland. The connec- 

 tive tissue frame- 

 work, the distribu- 

 tion of the blood- 

 vessels and lym- 

 phatics, and of the 

 gland tissue in lobes 

 and lobules, with the 

 corresponding inter- 

 and intra - lobular 

 ducts, is similar in 

 both cases. The 

 epithelium lining 

 the latter ducts is 



Only faintly striated, Fig. 122. From a Section through the 



not by any means Pancreas of Dog. 



j. ,. ,1 . a, The alveoli (tubes) of the gland; the lining 



SO CtlStinCtly as in cells show an outer honiosreneous and an inner 

 .1 . ! , 4. -U granular-looking portion; d, a minute duct. 



the salivary tubes. (Atias.) 

 The alveoli or acini 



are club-shaped, flask-shaped, shorter or longer cylin- 

 drical, and convoluted. 





