umbilical cord

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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.

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.

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.

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.
(embryology)
The long, cylindrical structure containing the umbilical arteries and vein, and connecting the fetus with the placenta.

umbilical cord

the long flexible tubelike structure connecting a fetus with the placenta: it provides a means of metabolic interchange with the mother
References in periodicals archive ?
Delayed cord clamping involves extending the time between the delivery of a neonate and clamping of the umbilical cord to at least 15 seconds.
The time to umbilical cord separation and any discomfort such as infection, hemorrhage, and discharge and odor were documented.
He said: "Things were looking pretty grim until I got the news about the possibility of an umbilical cord stem cell transplant.
Objective: To compare the extraction time and infection rate of umbilical cord by applying ethanol, humanmilk or dry care.
However, researchers from COPSAC (Copenhagen Studies on Asthma in Childhood) at the Faculty of Health Sciences, University of Copenhagen recently discovered indications that IgE in the blood of the umbilical cord could originate from the mother, and decided to conduct a focused study on this.
But work in America showed that if cells from two umbilical cords are combined there is enough to transplant for an adult.
In the past, if we failed to find a live donor, we have been stuck, but this time we searched the umbilical cord register too.
The use of umbilical cord stem cells is not currently available in Britain because the Government wants more research.
A substance believed to be an endocrine disrupter was found in the umbilical cord of a newborn baby in a study carried out by the Environment Ministry, the ministry said Wednesday.
Umbilical cord torsion has been established as an uncommon cause of intrauterine fetal demise.
Previous pathologic studies of placentas and umbilical cords have been retrospective and based on small population samples and have presented data from specimens analyzed because of specific perinatal problems (5,6).
OTCBB:CBAI), the umbilical cord blood stem cell preservation company which is focused on bringing the life saving potential of stem cells to families nationwide, in an upcoming presentation to the Southern California Investment Association, will compare the Company to others in its sector based on established financial guidelines and highlight Cord Blood America's advantages.