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The Endowment for Human Development
The Endowment for Human Development
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Head and Heart

4 weeks, 4 days

From The Biology of Prenatal Development.Buy Now

Note:

The beginnings of the mouth and facial bones are already in position.

Label Key:

1. 1st pharyngeal arch (maxillary process)
2. midbrain
3. 1st pharyngeal arch (mandibular process)
4. placental vessel
5. forebrain
6. chest wall
7. area of future mouth (stomodeum)
8. heart
9. 2nd pharyngeal arch
All ages referenced to fertilization, not last menstrual period.
Head, Heart, and Liver
Head, Heart, and Liver
Head and Heart
Head and Heart
Head and Heart
Head and Heart
The Head and Mouth
The Head and Mouth
Heart Chambers and Liver
Heart Chambers and Liver
Heart in Slow Motion
Heart in Slow Motion


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