J 



THE CHORIONIC VILLI. 



Ml 



Y\G. 202. — Isolated Terminal Branch ok a 

 Villus from a Human Chorion of Twklve 

 Weeks. 



T; 



^ 





«^ 



4 n^ 

 ^^-/■^p^--^'. 



.c/ 



Pig. 203. — Villous Stem from a Human Pla- 

 centa ok 'I'he Fifth Month. X 9 diams. 



Fig. 204. — Terminal Branches of a Villus from a 



Human Placenta at Full Term. 



The little spots indicate proliferation islands of the covering 



epithelium. Magnified. 





'/''"=i=.-^ 



Fig. 205. — Portion of an Injected Vil- 

 lus FROM A Placenta of about Five 

 Months. X 210 diams. 



