Difference between revisions of "Week 3 Development Movie"

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| width=400px|<mediaplayer width='388' height='500' image="http://embryology.med.unsw.edu.au/embryology/images/d/df/Week3_folding_icon.jpg">File:Week3_folding.mp4</mediaplayer>
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| width=400px|<html5media height="540" width="390">File:Week3_folding.mp4</html5media>
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[[Media:Week3_folding.mp4|'''Click Here''' to play on mobile device]]
 
| [[File:Week3_folding icon.jpg|100px|right]]  
 
| [[File:Week3_folding icon.jpg|100px|right]]  
 
===Embryo Folding===
 
===Embryo Folding===
This animation shows folding of the embryonic disc beginning week 3 of development.  
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This animation shows a mid-sagittal section of the folding of the embryonic disc beginning week 3 of development.  
  
Embryonic disc (midline section) shown to the left and early placenta to the right.  The embryonic disc dorsal (ectoderm) top and ventral (endoderm) bottom. Cranial end of disc to the left and caudal end of disc to the right.  
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Embryo (midline section) shown to the left and early {{placenta}} to the right.  The embryonic disc dorsal ({{ectoderm}}) top and ventral ({{endoderm}}) bottom. Cranial end of disc to the left and caudal end of disc to the right.  
  
Note also the early cardiac region shown at the cranial end of disc and the [[A#allantois|allantois]] at the caudal end of disc extending into the [[C#connecting stalk|connecting stalk]].
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Note also the early cardiac region shown at the cranial end of disc and the allantois at the caudal end of disc extending into the connecting stalk.
  
 
Folding of the embryonic disc
 
Folding of the embryonic disc
# brings the cardiac region and [[A#allantois|allantois]] ventrally
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# brings the cardiac region and {{allantois}} ventrally
# brings the [[B#buccopharyngeal membrane|buccopharyngeal membrane]], [[C#cloacal membrane|cloacal membrane]] and connecting stalk ventrally
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# brings the [[B#buccopharyngeal membrane|buccopharyngeal membrane]], {{cloacal membrane}} and connecting stalk ventrally
 
# encloses the embryo in amniotic cavity
 
# encloses the embryo in amniotic cavity
# narrows the connection between yolk sac and midgut of the gastrointestinal tract to a channel, the [[Y#yolk stalk|yolk stalk]] or [[V#vitelline duct|vitelline duct]]
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# narrows the connection between {{yolk sac}} and midgut of the gastrointestinal tract to a channel, the {{yolk stalk}} or {{vitelline duct}}
 
 
  
* <font color=lightskyblue>'''blue'''</font> - epiblast layer of amniotic cavity
 
* <font color=gold>'''yellow'''</font> - endoderm layer of the yolk sac and gastrointestinal tract
 
* <font color=tomato>'''red'''</font> - outside embryo extraembryonic mesoderm and inside embryo mesoderm
 
  
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* <font color=lightskyblue>'''blue'''</font> - {{ectoderm}} layer of embryo and amniotic cavity
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* <font color=gold>'''yellow'''</font> - {{endoderm}} layer of the yolk sac and gastrointestinal tract
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* <font color=tomato>'''red'''</font> - {{mesoderm}} layer of embryo and extra-embryonic mesoderm outside of embryo.
  
  
:'''Links:''' [[Media:Week3_folding.mp4|MP4 version]] | [[Media:Week3_folding.mov|Quicktime version]]  | [[Week 3]] | [[Movies]]
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:'''Links:''' [[Media:Week3_folding.mp4|MP4 version]] | [[Week 3]] | [[Movies]]
 
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{{Week 3 Links}}
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<br>
 
{{Movie footer}}
 
{{Movie footer}}
  
 
[[Category:Week 3]]
 
[[Category:Week 3]]

Latest revision as of 11:01, 14 November 2018

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Click Here to play on mobile device

Week3 folding icon.jpg

Embryo Folding

This animation shows a mid-sagittal section of the folding of the embryonic disc beginning week 3 of development.

Embryo (midline section) shown to the left and early placenta to the right. The embryonic disc dorsal (ectoderm) top and ventral (endoderm) bottom. Cranial end of disc to the left and caudal end of disc to the right.

Note also the early cardiac region shown at the cranial end of disc and the allantois at the caudal end of disc extending into the connecting stalk.

Folding of the embryonic disc

  1. brings the cardiac region and allantois ventrally
  2. brings the buccopharyngeal membrane, cloacal membrane and connecting stalk ventrally
  3. encloses the embryo in amniotic cavity
  4. narrows the connection between yolk sac and midgut of the gastrointestinal tract to a channel, the yolk stalk or vitelline duct


  • blue - ectoderm layer of embryo and amniotic cavity
  • yellow - endoderm layer of the yolk sac and gastrointestinal tract
  • red - mesoderm layer of embryo and extra-embryonic mesoderm outside of embryo.


Links: MP4 version | Week 3 | Movies
Amnion 001 icon.jpg
 ‎‎Amniotic Cavity
Page | Play

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

Week 3 Links: stage 7 | stage 8 | stage 9 | Gastrulation | Endoderm | Mesoderm | Ectoderm | Placenta | Coelomic Cavity | Lecture | Category:Week 3 | GA week 5


Glossary Links: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Movies


Cite this page: Hill, M.A. (2019, October 20) Embryology Week 3 Development Movie. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Week_3_Development_Movie

What Links Here?
© Dr Mark Hill 2019, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G