These are cells that I that were obtained either from a more developed embryo, past the blastocyst stage.

这些细胞是我从,发育的更成熟的一些胚胎中提取的,这些胚胎已经过了囊胚期了

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This process of cell proliferation or cell division is, of course, very important during development of an embryo.

细胞增殖和分裂的过程,在胚胎发育中至关重要

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So we need to get embryonic stem cells to form surface cells.

那么，我们就应该从表层细胞中提取胚胎干细胞。

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It's this group of cells, this subset of cells from the developing embryo that become the embryo, that become the organism, become the human.

这一组细胞,这组发育胚胎中的细胞亚群,发育成胚胎,发育组织,直至发育成整个人体

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During development of the embryo it goes from being a single cell, the fertilized egg, to being a multi-cellular organism with billions of cells in it.

胚胎的发育,始于一个单一细胞,即受精卵,直到形成一个以十亿计数量的细胞构成的,多细胞有机体

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It's this - its cells in this region here, this inner cell mass that that's the source of embryonic stem cells, cells from inner cell mass here.

就是这个,在这片区域的胚胎细胞,即内细胞群,而胚胎干细胞的来源所在,就是源自这里的内细胞群

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So if that was all that was happening then an embryo would just be many, many cells that are all identical and you know that's not the case.

但如果仅是这样,那么胚胎就只有,许多一模一样的细胞,但实际不是这样

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There's one division, here it shows it at the 16 cell stage and then here, and this transformation as it goes from 16 cells to more like 64 cells.

这是第一次分裂,这里显示的是十六细胞期,然后在这里,在这里胚胎进一步的产生了变化,由十六个细胞分裂为约六十四个

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The cell divides, and divides, and divides many, many times and that's one of the signature events of embryogenesis until we have many, many cells that make up our bodies.

细胞不断分裂,持续进行,那是胚胎发育中,一个标志性的过程,在那之后,我们就有了许许多多构成我们身体的细胞

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Further down the line, for example, in the blastocyst I talked about before, we could obtain cells from this inner cell mass or this cluster of cells that becomes the embryo.

沿着这条线看,举个例子,就是我之前提到过的囊胚,我们可以取一些内细胞群的细胞,这种能成为胚胎的细胞群

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Now I isolated these cells maybe from the head region of the embryo, the region that's going to develop into the brain, so that would be a good place to look if you wanted cells that were going to develop into the brain.

现在我可以从胚胎的头部,分离这些细胞,从就要发育成为大脑的这些部位,这是取得你需要的细胞的绝佳位置,如果你想要发育成大脑的细胞的话

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