Umbilical artery

Artery: Umbilical artery
Gray502.png
Fetal circulation; the umbilical vein is the large, red vessel at the far left. The umbilical arteries are purple and wrap around the umbilical vein.
Gray39.png
Scheme of placental circulation.
Latin a. umbilicalis
Gray's subject #139 540
Source internal iliac artery   
Branches superior vesical artery
artery of the ductus deferens
Vein umbilical vein
MeSH Umbilical+Arteries

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.

Contents

Umbilical arteries in the fetus

Umbilical arteries supply deoxygenated blood from the fetus to the placenta in the umbilical cord. There are usually two umbilical arteries present together with one umbilical vein in the cord. The umbilical arteries are actually the latter of the internal iliac arteries that supply the hind limbs with blood and nutrients in the fetus. The umbilical arteries surround the urinary bladder and then carry all the deoxygenated blood out of the fetus through the umbilical cord.

The umbilical arteries are the only arteries in the human body, aside from the pulmonary arteries, that carry deoxygenated blood.

The pressure inside the umbilical artery is approximately 50 mmHg.[1]

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.[2] Subsequently, they branch into chorionic arteries or intraplacental fetal arteries.[3]

Umbilical artery in the adult

The umbilical artery is a branch of the anterior division of the internal iliac artery and represents the patent (open) part of the embryonic umbilical artery. (The non-patent obliterated part of the artery is the medial umbilical ligament.) The umbilical artery is found in the pelvis, and gives rise to the superior vesical arteries. In males, it also gives rise to the artery to the ductus deferens.

Additional images

See also

  • Single umbilical artery

References

  1. ^ Fetal and maternal blood circulation systems From Online course in embryology for medicine students. Universities of Fribourg, Lausanne and Bern (Switzerland). Retrieved on 6 April 2009
  2. ^ Gordon, Z.; Elad, D.; Almog, R.; Hazan, Y.; Jaffa, A. J.; Eytan, O. (2007). "Anthropometry of fetal vasculature in the chorionic plate". Journal of Anatomy 211 (6): 698–706. doi:10.1111/j.1469-7580.2007.00819.x. PMC 2375851. PMID 17973911. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2375851.  edit
  3. ^ Hsieh, FJ; Kuo, PL; Ko, TM; Chang, FM; Chen, HY (1991). "Doppler velocimetry of intraplacental fetal arteries". Obstetrics and gynecology 77 (3): 478–82. PMID 1992421.  edit

External links



Wikimedia Foundation. 2010.

Look at other dictionaries:

  • umbilical artery — n either of a pair of arteries that arise from the hypogastric arteries of the mammalian fetus and pass through the umbilical cord to the placenta to which they carry the deoxygenated blood from the fetus * * * arteria umbilicalis …   Medical dictionary

  • umbilical artery — noun : either of a pair of arteries that arise from the hypogastric arteries of the mammalian fetus and pass through the umbilical cord to the placenta to which they carry the impure blood from the fetus …   Useful english dictionary

  • cord of umbilical artery — chorda arteriae umbilicalis …   Medical dictionary

  • Umbilical cord — of a three minute old child. A medical clamp has been applied. Latin funiculus umbilicalis Code …   Wikipedia

  • Umbilical — may refer to: Umbilical cable Umbilical cord Umbilical fold Umbilical hernia Umbilical notch Umbilical vessels Umbilical artery Umbilical vein Umbilical zone The Umbilical Brothers, two Australian comedic performers, David and Shane Umbilical… …   Wikipedia

  • Umbilical folds — Posterior view of the anterior abdominal wall in its lower half. Umbilical folds labeled near middle …   Wikipedia

  • Umbilical cord prolapse — Classification and external resources Cord prolapse, depicted by W.Smellie, 1792 ICD 10 O …   Wikipedia

  • Umbilical vessels — can refer to: * Umbilical artery * Umbilical vein …   Wikipedia

  • Umbilical vein — Infobox Vein Name = Umbilical vein Latin = vena umbilicalis GraySubject = 135 GrayPage = 519 Caption = Fetal circulation; the umbilical vein is the large, red vessel at the far left. Caption2 = Human embryo about fifteen days old. Brain and heart …   Wikipedia

  • Umbilical line — An umbilical line is a catheter that is inserted into one of the two arteries or the vein of the umbilical cord. Generally the UAC/UVC (Umbilical Artery Catheter/Umbilical Vein Catheter) is used in Neonatal Intensive Care Units (NICU) as it… …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.