释义 |
EncyclopediaSeeextraembryonic coelomchorionic cavity
chorionic cavitythe 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. |