The outer membrane enclosing the embryo in reptiles,birds,and mammals.In placental mammals it contributes to the development of the placenta.

 
  • 绒毛膜在爬行类动物、鸟类及哺乳类动物中包含胚胎的外膜,在有胎盘哺乳动物中与胎盘的发育有关
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