B. 





FIG. 85. Chorionic villi of an ovum of tlve weeks. A, longitudinal section ; B, transverse section. 

 Greatly magnified. 1, cellular stratum of Langhans ; 2, syneytium ; 3, processes of syn- 

 cytium ; 4, foetal capillary vessels ; 5, connective tissue of villus (stroma). 



