title: [Structure of the placenta in bears].
abstract: It is described the placenta of a bear ( Tremarctos ornatus ). The placenta shows a discoidal form (placenta discoidalis ) with a distinct marginal hematoma. Histological the placenta is a placenta endotheliochorialis which is characterized by the placental labyrinth and a striking transitional zone.
mesh_terms: D000818:Animals; D002335:Carnivora / Q000033:anatomy & histology*; D002824:Chorionic Villi / Q000033:anatomy & histology; D005321:Extraembryonic Membranes / Q000033:anatomy & histology; D005260:Female; D010920:Placenta / Q000033:anatomy & histology*; D011247:Pregnancy; D014327:Trophoblasts / Q000033:anatomy & histology; D001503:Ursidae / Q000033:anatomy & histology*
vernacular_title: Zum Bau der Plazenta beim Bären.