extraembryonic coelom

(redirected from Chorionic cavity)
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extraembryonic coelom

[¦ek·strə‚em·brē′än·ik ′sē·ləm]
(embryology)
The cavity in the extraembryonic mesoderm; it is continuous with the embryonic coelom in the region of the umbilicus, and is obliterated by growth of the amnion.
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References in periodicals archive ?
The amniotic cavity which was dorsal to the germ disk enlarges to encircle the embryo and obliterate the chorionic cavity.
A Faulty invagination process prevents obliteration of chorionic cavity and formation of umbilical cord.