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The Endowment for Human Development
The Endowment for Human Development
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The Lower Embryo

4 weeks, 6 days

From The Biology of Prenatal Development.Buy Now

Label Key:

1. chest wall
2. heart
3. placental vessels
4. umbilical cord
5. liver
6. amnion surrounding embryo
7. abdominal wall
All ages referenced to fertilization, not last menstrual period.
Head and Heart
Head and Heart
Upper and Lower Limb Buds
Upper and Lower Limb Buds
The Lower Embryo
The Lower Embryo
Yolk Sac and Vitelline Vessels
Yolk Sac and Vitelline Vessels
Vitelline Vessels and Yolk Sac
Vitelline Vessels and Yolk Sac
The Lower Limbs and Back
The Lower Limbs and Back
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