Chorionic Cavity Movie

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Embryology - 16 Nov 2018    Facebook link Pinterest link Twitter link  Expand to Translate  
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Chorion 001 icon.jpg
Animation shows the events following implantation and focuses on changes in the the spaces surrounding the embryonic disc, the extraembryonic coelom.

The blastoceol cavity is converted into two separate spaces: the yolk sac and the chorionic cavity.

The third space lies above the epiblast layer of the embryonic disc, the amniotic cavity.


  • white cells - (left) endometrial gland (right) endometrial epithelium
  • blue - epiblast layer (forming ectoderm and amniotic cavity lining)
  • yellow - hypoblast layer (replaced with endoderm during gastrulation)
  • red cells - extraembryonic mesoderm layer
  • green - trophoblast layers (cytotrophoblast and syncytiotrophoblast)
  • red spaces - blood-filled spaces, maternal lacunae


Links: MP4 version | Implantation Movie | Week 2 | Movies
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Cite this page: Hill, M.A. (2018, November 16) Embryology Chorionic Cavity Movie. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Chorionic_Cavity_Movie

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© Dr Mark Hill 2018, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G