囊胚的英文怎么说
囊胚的英文: The modified blastula that is characteristic of placental mammals. The formation of a gastrula from a blastula by invagination. The outer layer of a blastula that gives rise to the ectoderm after gastrulation. The infolding of a portion of the outer layer of a blastula in the formation of a gastrula. The ingrowth and curling inward of a group of cells,as in the formation of a gastrula from a blastula. n. 胞胚 The formation of a gastrula from a blastula by invagination. The modified blastula that is characteristic of placental mammals. The infolding of a portion of the outer layer of a blastula in the formation of a gastrula. The outer layer of a blastula that gives rise to the ectoderm after gastrulation. |