THE STOMACH AND INTESTINE. 



273 



Fig. 215- Illustrations of models, made after Bern's wax-plate reconstruction 

 method, of glandular structures and duodenal villi of the human intestine ; X Io : a > 

 Fundus gland ; b, three pyloric glands ; the one at the left is a simple tubular gland, 

 the middle one a branched tubulo-alveolar gland ; the one at the right a typical pyloric 

 gland of the branched tubular variety ; c, leaf-shaped villi and crypts of Lieberkiihn of 

 the duodenum ; d, crypts of Lieberkiihn of the large intestine. 

 18 



