Extraembryonic coelom

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Extraembryonic coelom
Carnegie stage 6a
Days 12
Precursor Heuser's membrane
Dorlands/Elsevier c_44/12247640

The extraembryonic coelom is a portion of the conceptus consisting of a cavity between Heuser's membrane and the hypoblast.

It divides the two layers of extraembryonic mesoderm (splanchnopleuric and somatopleuric).

It is also known as the "chorionic cavity".[1]

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