



V6. 



FIG. 190. HUMAN PLACENTA IN SITU, ABOUT SEVEN MONTHS. VERTICAL SECTION. 



Am, Amnion. Cho, Chorion. Vi, Villous trunk, vi, Sections of villi in the substance of the placenta. D f ,D /f , 



Decidua serotina. Me, Muscularis. Ve, Uterine artery, opening into the placenta ; the foetal blood-vessels 



are drawn black ; the maternal blood-vessels white ; the chorionic tissue is stippled, except the canalized 



. fibrin, which is shaded by lines. The remnants of the gland cavities in the decidua are stippled dark. 



X 6 diams. 



330 



