Chorionic Cavity

Some articles on chorionic cavity, cavity:

Bilaminar Blastocyst - Formation of The Yolk Sac and Chorionic Cavity
... The formation of the chorionic cavity (Extra-embryonic coelom) and the yolk sac (umbilical vesicle) is still up for debate ... mesoderm makes its way into the blastocyst cavity to fill it with loosely packed cells ... the extraembryonic mesoderm is separated into two portions, a new gap arises called the chorionic cavity, or the extra-embryonic coelom ...