Life-size and with lifelike detail, this model (15½" x 10½" x 4") reveals all the major structures of the placenta. Features cotyledons on the maternal surface and amniotic and chorionic membranes on the fetal surface. A sectional cutout of the placenta exposes the subchorial space, villi with fetal arteries and veins, and more. Comes with key. Great for explaining the anatomy of the placenta, how substances can cross the placenta, and more.