Epiblast

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

In amniote embryonic development, the epiblast (also known as the primitive ectoderm) is one of two distinct cell layers arising from the inner cell mass in the mammalian blastocyst, or from the blastula in reptiles and birds.

Excerpt from the Wikipedia article “Epiblast”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Goultard59, CC BY-SA 4.0, via Wikimedia Commons.