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The Endowment for Human Development
The Endowment for Human Development
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Germ Layers of the Embryo

14 days

Germ Layers of the Embryo [Click for next image]
From The Biology of Prenatal Development.Buy Now

Label Key:

1. neural groove
2. hypoblast
3. epiblast (ectoderm)
All ages referenced to fertilization, not last menstrual period.
Embryo Cross Section 8-9 Days
Embryo Cross Section 8-9 Days
Embryo at About 11 Days
Embryo at About 11 Days
Germ Layers of the Embryo
Germ Layers of the Embryo
Tube Shaped Heart
Tube Shaped Heart
Three-Week Embryo
Three-Week Embryo
Left Lateral View: 3-Week Embryo
Left Lateral View: 3-Week Embryo
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