中外胚层

However, cell counts and inner cell mass to trophectoderm ratios of the embryos exposed to elevated temperature were not different from controls, suggesting that the developmental potential of the embryos which survive to blastocyst stage are not overtly impaired.

然而，处理组牛胚在温度升高过程中，发育到第9天的囊胚数，细胞数及内细胞团与滋养外胚层比率在统计学上与对照组之间没有差异。由此揭示，升高温度对牛囊胚期胚胎的发育没有明显损害。

Here, using transgenic axolotls with a combination of fate-mapping approaches, we present reliable evidence of oral teeth derived from both the ectoderm and endoderm and, moreover, demonstrate teeth with a mixed ecto/endodermal origin.

我们利用转基因蝾螈和&命运作图&技术证明牙齿可分别来源于外胚层和中胚层，或者早期的两者混合组织。

Fibroblast growth factor is a kind of the polypeptide growth factors, which is known to be a mitogen for a wide variety of mesoderm-and neuroectoderm-derived cells and a neurotrophic factor for several neuronal cell types.

成纤维细胞生长因子是一种对中胚层及神经外胚层源的细胞都有促分裂活性的多肽生长因子，也是一种重要的神经营养因子。

Thickened midline plate of neuroectoderm that develops into the neural tube, giving rise to the central nervous system.

神经外胚层的中线板增厚形成神经管，发展成日后的中枢神经系统。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。