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The Endowment for Human Development
The Endowment for Human Development
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Umbilical Cord and Amnion

6 weeks, 6 days

Umbilical Cord and Amnion [Click for next image]
From The Biology of Prenatal Development.Buy Now

Note:

The umbilical cord passes through the amnion to reach the placenta. Within the umbilical cord, the umbilical vein is larger than the umbilical arteries. It is also brighter in color because the blood it carries holds more oxygen.

Label Key:

1. amnion
2. umbilical artery
3. placental vessels
4. umbilical vein
All ages referenced to fertilization, not last menstrual period.
Right Lower Limb
Right Lower Limb
The Umbilical Cord
The Umbilical Cord
Umbilical Cord and Amnion
Umbilical Cord and Amnion
The Liver and Beating Heart
The Liver and Beating Heart
Right Hand and Nipple
Right Hand and Nipple
The Heart and Brain
The Heart and Brain
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