Image Gallery
Yolk Sac and Vitelline Vessels
![Yolk Sac and Vitelline Vessels [Click for next image]](/images/prenatal_numbered_655/yolk-sac-and-vitelline-vessels-2.jpg "Click for next image")
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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. |
Upper and Lower Limb Buds
The Lower Embryo
Yolk Sac and Vitelline Vessels
Vitelline Vessels and Yolk Sac
The Lower Limbs and Back
Central Nervous System
