chorionic cavity


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.