chorionic cavity


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chorionic cavity

the space surrounding the primary yolk sac and amniotic sac, except where the connecting stalk attaches to the cytotrophoblast of the blastocyst.

chor·i·on·ic cav·i·ty

(kōr'ē-on'ik cav'i-tē)
The space surrounding the umbilical vesicle (primary yolk sac) and amnionic sac, except where the connecting stalk attaches to the cytotrophoblast of the blastocyst.
Synonym(s): extraembryonic celom.
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