Development Animation - Week 3

From Embryology
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Week3_folding icon.jpg</wikiflv> This animation shows embryonic disc folding beginning week 3 of development.

Embryonic disc (midline section) shown to the left and early placenta to the right.


  • blue - epiblast layer of amniotic cavity
  • yellow - endoderm layer of the yolk sac and gastrointestinal tract
  • red - outside embryo extraembryonic mesoderm and inside embryo mesoderm


Compare this sectional view of folding with the Amniotic Cavity view, filling the amnion and yolk cavities. Amnion 001 icon.jpg

Quicktime version





Source: UNSW Embryology Thanks to the late Prof William Larsen for allowing permission to use animations based on images from his textbook. (More? movie technical information)

Links: Movies Page | Category:Movies


Cite this page: Hill, M.A. (2024, April 25) Embryology Development Animation - Week 3. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Development_Animation_-_Week_3

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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