The foetal membranes of polar bear (Thalarctos maritimus).
D000818:Animals; D002335:Carnivora / Q000033:anatomy & histology*; D005321:Extraembryonic Membranes / Q000033:anatomy & histology*; D005260:Female; D010920:Placenta / Q000033:anatomy & histology; D011247:Pregnancy; D014470:Umbilical Cord / Q000033:anatomy & histology