umbilical cord

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Related to umbilical cord: placenta, umbilical cord blood

umbilical cord

(ŭmbĭl`ĭkəl), cordlike structure about 22 in. (56 cm) long in the pregnant human female, extending from the abdominal wall of the fetus to the placentaplacenta
or afterbirth,
organ that develops in the uterus during pregnancy. It is a unique characteristic of the higher (or placental) mammals. In humans it is a thick mass, about 7 in. (18 cm) in diameter, liberally supplied with blood vessels.
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. Its chief function is to carry nourishment and oxygen from the placenta to the fetus and return waste products to the placenta from the fetus. It consists of a continuation of the membrane covering the fetus and encloses a mucoid jelly through which one vein carries oxygenated blood and two arteries carry unoxygenated blood. After birth, the cord is clamped off and cut. It is sometimes abnormal in length and may break prematurely or form loops or knots, which may asphyxiate the fetus. The stump of the cord that is left attached to the infant withers and drops off, leaving the scar known as the navel.

Because umbilical cord blood is especially rich in stem cellsstem cells,
unspecialized human or animal cells that can produce mature specialized body cells and at the same time replicate themselves. Embryonic stem cells are derived from a blastocyst (the blastula typical of placental mammals; see embryo), which is very young embryo that
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 (cells that give rise to red blood cells and lymphocytes) some parents choose to save it in private cord blood banks in case of future need as a transplant alternative to bone marrow, but in many diseases treated with stem cells such autologous transplants are contraindicated. Studies have shown that people not related to the donor (genetically mismatched) can benefit from transplants of umbilical cord blood in combating leukemialeukemia
, cancerous disorder of the blood-forming tissues (bone marrow, lymphatics, liver, spleen) characterized by excessive production of immature or mature leukocytes (white blood cells; see blood) and consequently a crowding-out of red blood cells and platelets.
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 and other cancers. Cord blood has also been used to repair heart and other tissue defects in children with certain metabolic disorders.

The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Umbilical Cord


an anatomical formation in humans and other placental mammals that connects the fetus with the placenta, and—through the placenta—with the mother. The umbilical cord consists mainly of gelatinous tissue known as Wharton’s jelly, through which the two umbilical arteries and the umbilical vein pass. When the fetus is full-term, the umbilical cordis 1–1.5 cm thick and about 50 cm long.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

What does it mean when you dream about an umbilical cord?

An umbilical cord in a dream can represent a source of nourishment, but it often carries less pleasant connotations of dependency, or a crippling emotional tie to one’s mother.

The Dream Encyclopedia, Second Edition © 2009 Visible Ink Press®. All rights reserved.

umbilical cord

[əm′bil·ə·kəl ‚kȯrd]
(aerospace engineering)
Any of the servicing electrical or fluid lines between the ground or a tower and an uprighted rocket vehicle before the launch. Also known as umbilical.
The long, cylindrical structure containing the umbilical arteries and vein, and connecting the fetus with the placenta.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

umbilical cord

the long flexible tubelike structure connecting a fetus with the placenta: it provides a means of metabolic interchange with the mother
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Umbilical cord tissue was collected from each case and was immediately put in formalin for fixation.
A significant positive correlation existed between plasma and umbilical cord TAC (p=0.01).
This can occur when there is a cessation of blood flow through the placenta, as a result of complete umbilical cord obstruction, or when there is a uterine abruption.
Pregnant women often undergo prenatal screening at second trimester and third trimester.7 When pregnant women with UCEA give birth, UCEA, especially VUCEA, dilates cervix, compresses blood vessels of the fetus, and even threatens his life.8,9 Therefore, during antenatal examination, attention should be paid at placenta and umbilical cord condition.
Some authors believe that 3D power sonography may be helpful in the diagnosis of the umbilical cord knots especially in the 3rd trimester.9 Ramon et al reported characteristics sonographic findings of this condition.10 Study done by Guzikowski et all to assess the role of 2D and 3D ultrasound for diagnosing true knot of the umbilical cord found it a useful modality.6
Physicians began clamping umbilical cords immediately following delivery during this time to prevent additional transfusion of medication through blood.
The relationship between umbilical cord morphology and prenatal complications such as intrauterine losses, gestational diabetes, preeclampsia, intrauterine growth retardation and fetal distress has emphasized by some researchers (Raio et al, 1999; Di Naro et al., 2001a; Weissman & Jakobi, 1997; Goodlin, 1987; Silver et al., 1987).
However, due to home deliveries, illiteracy and myriad social-cultural factors, many mothers, especially in rural areas, use crude, ineffectual methods to heal the umbilical cord wound some smear mud on the wound, others soot, saliva, herbs, and even lizard poop, all which can lead to infection.EIGHT CHILDRENJoan Wanjala, a 34-year-old mother of eight from Lunakwe village, Bungoma County, says she has been there, done that.
In January 2017, the Committee on Obstetric Practice of the American College of Obstetricians and Gynecologists issued a new set of recommendations regarding the timing of umbilical cord clamping.
Increased intramural pressure due to umbilical vein obstruction is also thought to play a role in the development of chorangiosis in cases associated with cord anomalies, such as long umbilical cord and thrombosis of vessels (3).
Both umbilical cord blood and bone marrow stem cells are today used for medical treatments for more than 70 diseases and conditions such as leukemia and sickle cell disease.View the full article from NJBIZ at
18, 2018- CBR (Cord Blood Registry) announced publication of the results of a clinical trial evaluating the use of autologous umbilical cord blood in children with acquired sensorineural hearing loss (SNHL).

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