Skip Navigation

High-power view of midsagittal section

A general high-power photomicrograph, showing an essentially midsagittal section through the ovum. The decidual reaction about the ovum is moderately prominent. The outer syncytiotrophoblast has an irregular, intercommunicating, lacunar network containing maternal blood. The cytotrophoblast consists of an irregular inner shell, varying from a single layer of differentiated Langhans' epithelium to irregular masses of proliferating cells projecting into the syncytiotrophoblast constituting the primordia of chorionic villi.

Fig. 23. Hertig and Rock, 1941.

Click on the picture to view the full-sized image.

Keywords: Langhans' epithelium, cytotrophoblast, decidual reaction, embryo, lacunar network, primordia of chorionic villi, syncytiotrophoblast

Source: The Virtual Human Embryo.