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The Endowment for Human Development
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Slideshow: Umbilical Cord, Placenta & More

The 9-Week Umbilical Cord

#360, Slide 22 of 35

9 weeks

From The Biology of Prenatal Development.Buy Now

Note:

Note the definite color difference between the umbilical vein and artery.

Label Key:

1. umbilical vein
2. umbilical artery
3. chorionic plate
All ages referenced to fertilization, not last menstrual period.
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