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The primitie mouth, or stomodeum, is a slight depression on the surface of the ectoderm.

的口(或口凹)是外胚层表面的一个轻微的凹

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Bilateral oal thickenings of the surface ectoderm, called nasal placodes, then deelop on each side of the inferior part of the frontonasal prominence.

外胚层表面呈双边卵圆形增厚形成鼻板,然成为额鼻隆起的下半部分。

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大揭秘

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,并将其储存在中胶层中。

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Osmosis-生

During fetal development, the entire body derives from three layers, called germ layers, the ectoderm, mesoderm, and endoderm.

胚胎发育过程由三个胚层组成,分别是:外胚层、中胚层与内胚层。

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Osmosis-生

The other type are immature teratomas, and they develop specifically from neuroectoderm cells - which come from the ectoderm layer.

二种是未成熟畸胎瘤,专门由神经外胚层细胞发育而来,来自外胚层。

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大揭秘

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,可以让营养物被周围的细胞吸收。

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大揭秘

The jellyfish body is mainly composed of mesoglea, a jelly-like fluid sandwich between the outer ectoderm and the inner digestive cavity the endoderm.

水母的身体主要由中间胶组成,中间胶是一种果冻状的液体,夹在外外膜和内消化腔内膜之间。

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大揭秘

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,溶解在水中的氧气可以穿过它。

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Osmosis-神经

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。

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