Umbilical Cord and Amnion

#104, Slide 12 of 35

6 weeks, 6 days

From The Biology of Prenatal Development.

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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.

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