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The Endowment for Human Development
The Endowment for Human Development
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Embryo Cross Section 8-9 Days

8 days

From The Biology of Prenatal Development.Buy Now

Note:

The inner cell mass has divided into the epiblast and the hypoblast.

Label Key:

1. amniotic ectoderm
2. epiblast
3. amniotic cavity
4. hypoblast
All ages referenced to fertilization, not last menstrual period.
Hatched Blastocyst
Hatched Blastocyst
Free Blastocyst  (without zona)
Free Blastocyst (without zona)
Embryo Cross Section 8-9 Days
Embryo Cross Section 8-9 Days
Embryo at About 11 Days
Embryo at About 11 Days
Tube Shaped Heart
Tube Shaped Heart
Three-Week Embryo
Three-Week Embryo
Free resources and training for educators
Buy the Biology of Prenatal Development DVD