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The Endowment for Human Development
The Endowment for Human Development
Improving lifelong health one pregnancy at a time.
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Digestive Tract, 4-Week Embryo

4 weeks

Digestive Tract, 4-Week Embryo [Click for next image]
From The Biology of Prenatal Development.Buy Now

Label Key:

1. hindbrain
2. heart
3. spinal cord
4. foregut
5. midgut
6. midbrain
7. forebrain
8. chest wall
9. yolk sac
10. hindgut
All ages referenced to fertilization, not last menstrual period.
The Folding Heart
The Folding Heart
Four-Week Embryo
Four-Week Embryo
Digestive Tract, 4-Week Embryo
Digestive Tract, 4-Week Embryo
The Body Plan Emerges
The Body Plan Emerges
Right Upper Limb
Right Upper Limb
The Heart in Motion
The Heart in Motion
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