囊

It is concluded that the initial ancotomic site of blood island genesis may be is mesoblast of extraembryonic blastoderm rather than the yolk sac; the blood vessel endothelium cells and the blood cells are generated parallel; the PGCs are the common ancestry of angioblast and HSC.

血岛最早发生的解剖位置可能不是卵黄囊而是胚外胚盘中胚层，血管内皮细胞与血细胞平行发生，PGC是成血管－造血干细胞的共同祖先。

Result The embryonic development of Silnrus asotus in Dongting Lake was divided into 7 stages, namely, blastoderm stage, cleavage stage, blastula stage, gastrula stage, neurula stage, organogenesis stage and pre-hatching stage.

结果］洞庭黄鲶的胚胎发育过程可分为胚盘期、卵裂期、囊胚期、原肠期、神经胚期、器官形成期和出膜期7个阶段。

The cells of blastomere randomly distributed either embryonic parts or extraembryonic parts of blastocyst.

2-细胞胚胎卵裂球随机分布在囊胚的胚胎部分和胚外部分。

BACKGROUND: Presently, the method of establishing human embryonic stem cells mainly contains blastula method, nuclear transplantation method and embryo blastomere method.

背景：目前人胚胎干细胞建系的技术路线主要有囊胚法、核移植法和胚胎单卵裂球法，但由于破坏胚胎，涉及诸多伦理问题。

The modified blastula that is characteristic of ''.

胚泡转化的囊胚，为胎盘哺乳动物的特征

The modified blastula that is characteristic of placental mammals.

胚泡转化的囊胚，为胎盘哺乳动物的特征

The in growth and curl in g in ward of a group of cells,as in the formation of a gastrula from a blastula.

内长一组细胞的内部或向内生长，如从囊胚到原肠胚的生长过程

The ingrowth and curling inward of a group of cells,as in the formation of a gastrula from a blastula.

内长一组细胞的内部或向内生长，如从囊胚到原肠胚的生长过程

The outer layer of a blastula that gives rise to the ectoderm after gastrulation.

外胚层囊胚的外层，在原肠胚形成之后生后外胚层组织

The cells of the blastula called blastomeres also each receive a full diploid set of chromosomes.

这些囊胚细胞，称卵裂球，每个细胞都有一套二倍体染色体组。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。