[熊胎盘的结构]

Anat Anz. 1984;155(1-5):209-15.

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.

描述了一只眼镜熊（Tremarctos ornatus）的胎盘。胎盘呈盘状（盘状胎盘），有明显的边缘血肿。组织学上，该胎盘是内皮绒毛膜胎盘，其特征为胎盘迷路和一个显著的过渡区。