The umbilical cord connects a baby in the womb to its mother. It runs from an opening in your baby’s stomach to the placenta in the womb. The average cord is about 50cm (20 inches) long.
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There are usually two umbilical arteries present together with one umbilical vein in the umbilical cord. The umbilical arteries surround the urinary bladder and then carry all the deoxygenated blood out of the fetus through the umbilical cord. Inside the placenta, the umbilical arteries connect with each other at a distance of approximately 5 mm from the cord insertion in what is called the Hyrtl anastomosis.
https://en.wikipedia.org/wiki/Umbilical_artery
The umbilical artery is a paired artery (with one for each half of the body) that is found in the abdominal and pelvic regions. In the fetus, it extends into the umbilical cord.
https://en.wikipedia.org/wiki/Umbilical_artery
Nutrients and oxygen from the mother’s blood are transferred to the fetal blood, while waste products are transferred from the fetal blood to the maternal blood, without the two blood supplies mixing. The placenta is expelled from the uterus in a process called the after-birth. One possible problem in pregnancy is placenta previa, where the placenta is attached near or over the cervix.
http://americanpregnancy.org/while-pregnant/fetal-life-support-system/
Blood circulates through vessels in the cord, which consists of: 1  one vein that carries blood rich in oxygen and nutrients from you to your baby. 2  two arteries that return deoxygenated blood and waste products, such as carbon dioxide, from your baby back to the placenta.
http://www.nhs.uk/chq/Pages/2299.aspx?CategoryID=54
The umbilical cord is the life-line that attaches the placenta to the fetus. The umbilical cord is made up of three blood vessels: two smaller arteries which carry blood to the placenta and a larger vein which returns blood to the fetus. It can grow to be 60 cm long, allowing the baby enough cord to safely move around without causing damage to the cord or the placenta.
http://americanpregnancy.org/while-pregnant/fetal-life-support-system/
Between 5 and 15 days after your baby is born, the umbilical stump will dry out, turn black and drop off. After the stump comes off, it usually takes about 7-10 days for the belly button to heal completely.
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Enroll Now. Your baby will develop inside your uterus with the help of a fetal life-support system composed of the placenta, the umbilical cord, and the amniotic sac (which is filled with amniotic fluid).
http://americanpregnancy.org/while-pregnant/fetal-life-support-system/
Soon after the birth, the midwife will: 1  clamp the umbilical cord about 3-4cm (1½-2 inches) from your baby’s belly button with a plastic clip. 2  place another clamp at the other end of the cord, near the placenta.
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The umbilical arteries are one of two arteries in the human body, that carry deoxygenated blood, the other being the pulmonary arteries. The pressure inside the umbilical artery is approximately 50 mmHg.
https://en.wikipedia.org/wiki/Umbilical_artery
how many vessels in an umbilical cord
There are three vessels in an umbilical cord.