Slideshow: Umbilical Cord, Placenta & More
Yolk Sac and Vitelline Vessels
#84, Slide 2 of 35
5 weeks, 2 days
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Note:The yolk sac helps feed the embryo until the placenta is operational. It does NOT contain yolk at any time.Label Key:1. yolk sac 2. yolk stalk 3. vitelline vessels | ||
| All ages referenced to fertilization, not last menstrual period. |
