Image Gallery
Close-up, Umbilical Cord at 7½ Weeks
![Close-up, Umbilical Cord at 7½ Weeks [Click for next image]](/images/prenatal_numbered_655/close-up-umbilical-cord-at-7-weeks.jpg "Click for next image")
| ||
Note:The coiled umbilical cord contains one vein and two arteries. Arteries always carry blood away from the heart, while veins return blood to the heart.Note:Note the brighter red color of the umbilical vein, reflecting its cargo of oxygenated blood that is returning from the placenta.Label Key:1. umbilical vein 2. vitelline vessels (yolk stalk) 3. umbilical arteries 4. placental vessels | ||
| All ages referenced to fertilization, not last menstrual period. |
The Right Hand
Close-up of the Right Knee
Close-up, Umbilical Cord at 7½ Weeks
Base of Umbilical Cord, 7½ Weeks
7½-Week Embryo
Fingers and Notches
