THE YILLI. 



3*3 



vessels, imstriped muscular fibres, and a single lymphatic 

 or lacteal vessel rarely looped or branched (fig. 80) ; 

 besides granular matter, fat globules, etc. 

 Fig. 80.* 



The epithelium is of the columnar kind, and continuous 

 with that lining the other parts of the mucous membrane. 

 The cells are arranged with their long axis radiating from 

 the surface of the villus (fig. 80), and their smaller ends 

 resting on the basement membrane. Some doubt exists 

 concerning the minute structure of these cells and their 

 relation to the deeper parts of the villus. But the opi- 

 nions given by different observers are so contradictory, 



* Fig. 80. (Slightly altered from Teichmann.) A. Villus of sheep. 

 B. Villi of man. 



