Head and Trunk

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A model of the central nervous system is superimposed within the embryo model on the left.

1. mesencephalon

2. spine

3. cerebral hemisphere

4. eye

5. right hand

6. liver

7. brain

8. scalp vessels

9. umbilical cord

10. heart chambers

All ages referenced to fertilization, not last menstrual period.

The Brain, Heart, and Liver

MRI Model of the Brain

Head and Trunk

Right Hand, Trunk, and Head

The Face and Trunk

Feet and Tips of the Toes

6 weeks, 6 days