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The umbilical cord develops from, and contains, remnants of the yolk sac and allantois.
In humans, the umbilical cord in a full term fetus is usually about 50 cm long and about 2 cm in diameter. It contains two umbilical arteries and one umbilical vein, buried within Wharton's jelly.
Recently, it has been discovered that the matrix within the umbilical cord (known as Wharton's jelly) is a rich and readily available source of primitive stem cells. Some parents have opted to have these stem cells harvested upon the baby's birth, and frozen for long-term storage should the child ever require them (for example to replace bone marrow destroyed when treating leukemiaLeukemia leukaemia in international English) is a group of cancers of the blood-forming tissues. The word leukemia tends to be used as an umbrella term. In the 19th century, it was seen as one single, homogenous deadly disease, characterized by a white ap).
For more information on umbilical cord blood storage and transplant: umbilical cord blood bankUmbilical Cord Banks both private and public, have developed since in the mid- to late 1990s in response to the success of umbilical cord blood transplants in treating diseases of the blood and immune systems, such as Fanconi's Anemia and Leukemia. Umbili.
The term "umbilical cord" or just "umbilical" has also come to be used for other cords with similar functions, such as the air hose connecting a deep-sea diver to his ship or a space-suited astronautBruce McCandless II using a manned maneuvering unit. Picture courtesy NASA An astronaut cosmonaut or taikonaut is a person who travels into space, or who makes a career of doing so. The criteria for determining who has achieved human spaceflight vary (see to his spacecraft.
The phrase "cutting the umbilical cord" is used symbolically to describe a child's breaking away from the parental home.
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