Image Gallery
Yolk Sac and Vitelline Vessels
![Yolk Sac and Vitelline Vessels [Click for next image]](/images/prenatal_unlabeled_655/yolk-sac-and-vitelline-vessels.jpg "Click for next image")
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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. |
Heart Chambers
The Vital Organs
Yolk Sac and Vitelline Vessels
Yolk Sac
The Beating Heart
Hand Plate and Vital Organs
