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The Endowment for Human Development
The Endowment for Human Development
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Slideshow: The Developing Brain

Central Nervous System

#77, Slide 11 of 21

5 weeks, 2 days

From The Biology of Prenatal Development.Buy Now

Note:

A model of the central nervous system (obtained from magnetic resonance imaging of a human embryo) is superimposed over the living embryo.

Label Key:

1. spinal cord
2. midbrain (mesencephalon)
3. amnion along edge of umbilical cord
4. umbilical vein within umbilical cord
All ages referenced to fertilization, not last menstrual period.
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