amniotic ectoderm
英
美
【医】羊膜外胚层：羊膜最内层（脐带的外膜），与体外胚层相延续
双语例句
- The bottom of the primitive amniotic cavity has differentiated into the ectoderm, about 72& 90 μ m in diameter. The endoderm of the lower surface of the embryonic knot continues to develop along the inner surface of the trophoblast to the equator.
原羊膜腔底部分化为外胚层，径约72～90μm，胚结腹面的内胚层伸向滋养层内1/2赤道处。