No more than 7% of the epiblast was made up of human cells, and just 5% of the hypoblast (in other areas the numbers were lower still).

人细胞在外胚层的比不超过7％，在内胚层只有5％（在另两比还要少）。

Very early on in fetal development, the ectoderm which is the outer layer of the fertilized egg starts to develop a bit of a ridge that eventually becomes the neural tube.

在胎儿发育的早期，受精卵的外层，即外胚层，开始形成脊状突起，最后形成神经管。

The layer of cells, the endoderm, is thin, like the ectoderm, allowing nutrients to be directly absorbed into the surrounding cells.

细胞的内胚层很薄，像外胚层一样，可以让营养物质直接周围的细胞吸收。

Ewing sarcoma is thought to arise from neuroectodermal cells, and which look like small, round, blue cells on microscopy.

尤因肉瘤源于神经外胚层细胞；它们在显微镜下呈现小的、圆形的蓝色细胞。

The jellyfish's outer layer of cells, called the ECTODERM, is so thin that oxygen dissolved in the water can simply diffuse right through it.

水母的外胚层细胞非常薄，溶解在水的氧气可以直接穿过它。

This protein causes defects in the differentiation process of human mesenchymal stem cell and neuroectodermal cells, resulting in Ewing sarcoma tumor cells.

该蛋白在间充质干细胞、神经外胚层细胞分化过程引起缺陷，产生尤因肉瘤肿瘤细胞。

Human cells in the chimera's epiblast behaved more like those found in human embryos than those found in monkey embryos.

嵌合体外胚层的人细胞的行更近似于人胚胎细胞，而不像猴子胚胎细胞。

The jellyfish absorbs oxygen through its ectoderm and can store it in the mesoglea.

水母通过外胚层吸收氧气，并将其储存在胶层。

The first category we're going to look at is the ectomorph.

我们要看的第一个别是外胚层。