Slideshow: Umbilical Cord, Placenta & More
Yolk Sac and Vitelline Vessels
#82, Slide 7 of 35
5 weeks, 6 days
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Note:According to some experts, the preferred name for "yolk sac" is "umbilical vesicle."Label Key:1. vitelline vessels 2. yolk sac | ||
| All ages referenced to fertilization, not last menstrual period. |
