

THE SMALL INTESTINE 



1175 



found in considerable numbers over every part of the mucous membrane of the small intestine. 

 They consist of minute tubular depressions of the mucous membrane, arranged perpendicularly to 

 the surface, upon which they open by small circular apertures. They may be seen with the aid 



FIG. 10G5 



FIG. 10C6 



Six feet. 



FIG. 1068 



Twelve feet. 



FIG. 1070 



Seventeen feet. 



Twenty feet. 





FiGf . 1065, 1066, 1067, 1068, 1069, 1070. Diagrams showing the arrangement and variations of the loops of the 

 mesenteric vessels for various segments of the small intestine of average length. Nearest the duodenum the mesenteric 

 loops are primary, the vasa recta are long and regular in distribution, and the translucent spaces (lunettes) are extensive. 

 Toward the ileocolic junction, secondary and tertiary loops are observed, the vessels are smaller and become obscured 

 by numerous fat-tabs. (After Monks.) 



