Cirumvallate Placenta. Page Links: Definition, Outcome, Screening, References. Definition. Circumvallate placenta refers to a thickened marginal rim of tissue around the chorionic (fetal) surface of the placenta forming a âwall,â which is composed of amnion, chorion, decidua and fibrin. The overall incidence is in the range of 1% to 2%.
âJane Hawk, the compelling heroine of The Silent Corner, returns in another terrifying Dean Koontz conspiracy thriller, The Whispering Room. . . . The character of Jane Hawk is arguably the best character Koontz has created. Knowledge of The Silent Corner helps put some of the narrative in perspective, but itâs not necessary to fall under the authorâs spell.
Jane Goodall is a primatologist most known for her long-term study of wild chimpanzees in Tanzania. The Gombe chimp observation, which Jane began in 1960, is the worldâs longest running continuous wildlife research project. Through her Jane Goodall Institute, she has become equally well known as a conservationist and a champion of human rights.