Uterine muscle. 



Remains of um- 

 bilical vesicle. 



Fetal villi of 

 chorion. 



Matt mill blood 

 sinus. 



Decidua serotina. 

 Placental septum. 



Peripheral vein 



Fused decidua vera 

 and rfflexa. 



Chorion. 

 Amnion. 



FIG. 242. Semidiagrammatic section of uterus, showing relations of fetal and maternal placenta (Ahlfeld). 

 Decidua serotina, decidua basalis; d. reflexa, old terminology for d. capsularis. 



