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Close-up, Umbilical Cord at 7½ Weeks

7 weeks, 4 days

Buy NowFrom The Biology of Prenatal Development.

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.
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Close-up, Umbilical Cord at 7½  Weeks
Close-up, Umbilical Cord at 7½ Weeks
Base of Umbilical Cord, 7½ Weeks
Base of Umbilical Cord, 7½ Weeks
7½-Week Embryo
7½-Week Embryo
Fingers and Notches
Fingers and Notches
Hands Touching
Hands Touching
Hand in Motion
Hand in Motion
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