Normal Villi (7-8 weeks) (20X)

Normal Villi (7-8 weeks) (20X) • The villi exhibit a covering of a double layer of syncytiotrophoblast (on the outside) and cytotrophoblast (on the inside) identified by the blue arrow. • The black arrow points to vessels containing almost exclusively nucleated red blood cells. • The vessels occupy only a small part of the cross section of the villus. (Description By:Linda Ernst ) (Image Contrib. by:Linda Ernst UCHC )