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Scanning electron micrograph showing the 3 germ cell layers.
The embryonic disc has been broken to expose the early three germ layers that form the entire embryo (scanning electron micrograph).


# Ectoderm
# [[Ectoderm]] - columnar epithelium
# Mesoderm
# [[Mesoderm]] - embryonic connective tissue (mesenchyme)
# Endoderm
# [[Endoderm]] - cuboidal epithelium




{{Template:SEM}}
* The amniotic cavity would lie above the ectoderm layer.
* The yolk sac would initially lie below the endoderm layer, later this would be the gastrointestinal tract within the embryo.
 
:Links: [[Gastrulation]] |  [[Ectoderm]] | [[Mesoderm]] | [[Endoderm]] | [[Week 3]]
 
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{{SEM}}
 
 
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[[Category:Electron Micrograph]] [[Category:Week 3]]
[[Category:Electron Micrograph]] [[Category:Week 3]]

Latest revision as of 09:45, 5 May 2014

Trilaminar Embryo (SEM)

The embryonic disc has been broken to expose the early three germ layers that form the entire embryo (scanning electron micrograph).

  1. Ectoderm - columnar epithelium
  2. Mesoderm - embryonic connective tissue (mesenchyme)
  3. Endoderm - cuboidal epithelium


  • The amniotic cavity would lie above the ectoderm layer.
  • The yolk sac would initially lie below the endoderm layer, later this would be the gastrointestinal tract within the embryo.
Links: Gastrulation | Ectoderm | Mesoderm | Endoderm | Week 3


Image Source: Scanning electron micrographs of the Carnegie stages of the early human embryos are reproduced with the permission of Prof Kathy Sulik, from embryos collected by Dr. Vekemans and Tania Attié-Bitach. Images are for educational purposes only and cannot be reproduced electronically or in writing without permission.

Embryonic Development


Cite this page: Hill, M.A. (2024, May 5) Embryology Trilaminar embryo.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Trilaminar_embryo.jpg

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

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