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Central Nervous System

5 weeks, 2 days

Buy NowFrom The Biology of Prenatal Development.

Label Key:

  • 1. isthmus
  • 2. mesencephalic flexure
  • 3. midbrain (mesencephalon)
  • 4. diencephalon
  • 5. epiphysis
  • 6. right and left cerebral hemispheres (telencephalon)
  • 7. filum terminale
  • 8. cerebellum
  • 9. pontine flexure
  • 10. 4th ventricle
  • 11. myelencephalon
  • 12. pons
  • 13. cervical flexure (brain-spinal cord junction)
  • 14. spine

All ages referenced to fertilization, not last menstrual period.
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Central Nervous System
Central Nervous System
Heart and Brain
Heart and Brain
Head and Heart
Head and Heart
Vitelline Vessels
Vitelline Vessels
Liver, Cord, and Left Foot Plate
Liver, Cord, and Left Foot Plate
Close-up of Heart and Liver
Close-up of Heart and Liver
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