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The Folding of the Embryo
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3 weeks, 3 days
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The Biology of Prenatal Development
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Label Key:
1. base of umbilical cord
2. hindbrain
3. midbrain
4. forebrain
5. site of the future opening of the mouth (called the stomodeum)
6. heart
7. yolk sac
All ages referenced to fertilization, not last menstrual period.
Three-Week Embryo
3-Week Embryo
The Folding of the Embryo
The 4-Week Embryo
The Folding Heart
Four-Week Embryo
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1 Comment
February 7, 2015 at 4:47 pm
Sushila Pereira
This video is such a saviour of the unborn. I hope and pray that we will soon see the end of abortion and the future of Canada and the world will be promising.
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