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Encyclopedia > Umbilical vein
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Fetal circulation; the umbilical vein is the large, red vessel at the far left
Fetal circulation; the umbilical vein is the large, red vessel at the far left

The umbilical vein is a blood vessel present during fetal development that carries oxygenated blood from the placenta to the growing fetus. Download high resolution version (558x900, 94 KB)Fetal circulation (Grays anatomy), from http://www. ... Download high resolution version (558x900, 94 KB)Fetal circulation (Grays anatomy), from http://www. ... Jump to: navigation, search The arterial system The blood vessels are part of the circulatory system and function to transport blood throughout the body. ... Jump to: navigation, search General Name, Symbol, Number oxygen, O, 8 Chemical series nonmetals Group, Period, Block 16, 2, p Appearance colorless Atomic mass 15. ... Jump to: navigation, search Red blood cells (erythrocytes) are present in the blood and help carry oxygen to the rest of the cells in the body Blood is a circulating tissue composed of fluid plasma and cells (red blood cells, white blood cells, platelets). ... Human placenta shown a few minutes after birth. ... Jump to: navigation, search Fetus at eight weeks Foetus redirects here. ...

Contents


Circulation

Attached to the uterine lining, the placenta is the site of gas exchange between mother and fetus. The singular umbilical vein carries oxygenated blood from the placenta to the fetus, while two umbilical arteries return deoxygenated blood to the placenta. The three vessels coil around one another within the Wharton's jelly of the umbilical cord and enter the abdomen at the umbilicus. The endometrium is the uterine membrane in mammals which is thickened in preparation for fertilization, and into which a fertilized egg is implanted upon its arrival into the uterus. ... Jump to: navigation, search Gas exchange or respiration takes place at a respiratory surface - a boundary between the external environment and the interior of the body. ... Umbilical arteries carry deoxygenated blood from the fetus to the placenta in the umbilical cord. ... Whartons jelly is a gelatinous substance within the umbilical cord. ... Newborn at 45 seconds. ... The human abdomen Footballer John Arne Riise flashing his abdominals The human abdomen (from the Latin word meaning belly) is the part of the body between the pelvis and the thorax. ... An umbilicus which appears as a depression in the abdomen is referred to as an innie. The umbilicus (commonly called a navel, or belly or tummy button), is essentially a scar caused at birth by the removal of the umbilical cord from a newborn baby. ...


Inside the fetus, the vein courses alongside the falciform ligament and then to the liver's underside. At the transverse fissure, the vein divides into two vessels, one larger than the other. The larger of the two is joined by the portal vein, and together they enter the right lobe of the liver. The smaller vessel, now called the ductus venosus, diverges away from the liver and joins with the inferior vena cava. Jump to: navigation, search The liver is an organ in vertebrates, including humans. ... The portal vein is a major vein in the human body draining blood from the digestive system and its associated glands. ... In the fetus, the ductus venosus connects the left umbilical vein with the upper inferior vena cava. ... This article may be too technical for most readers to understand. ...


Round ligament

Within a week of birth, the infant's umbilical vein is completely obliterated and is replaced by a fibrous cord called the round ligament (also called the ligamentum teres). It extends from the umbilicus to the tranverse fissure, where it joins with the ligamentum venosum to separate the left and right lobes of the liver. In telecommunication, the term lobe has the following meanings: An identifiable segment of an antenna radiation pattern. ...


Recanalization

Under extreme pressure, the round ligament may reopen to allow the passage of blood. Such recanalization is common in patients with cirrhosis and portal hypertension. Patients with cirrhosis experience rapid growth of scar tissue in and around the liver, often functionally obstructing nearby vessels. Vessel occlusion increases vascular resistance and therefore leads to hypertension. In portal hypertension, the vessels surrounding the liver are subjected to abnormally high blood pressure—so high, in fact, that the force of the blood pressing against the round ligament is sufficient to recanalize the structure. Jump to: navigation, search Blood pressure is the pressure exerted by the blood on the walls of the blood vessels. ... Cirrhosis is a chronic disease of the liver in which liver tissue is replaced by connective tissue, resulting in the loss of liver function. ... In medicine, portal hypertension is hypertension (high blood pressure) in the portal vein and its branches. ... Scar Tissue is the Red Hot Chili Peppers 1st single off their hit album, Californication. ... Jump to: navigation, search The liver is an organ in vertebrates, including humans. ...


References

  • Peculiarities in the vascular system of the fetus

See also

A human umbilical vein graft (HUVG) is a specially prepared human umbilical vein that is used as a vascular graft. ...

  Results from FactBites:
 
Neonatology on the Web: Sidbury 1923 (2974 words)
In infants the routes that have been used are the superficial veins of the arm, of the neck, of the scalp and the popliteal or femoral vein.
At this juncture the mother's arm was prepared as usual, and the median basilic vein was entered with a needle similar to the one used in the baby's vein.
The umbilical vein may be patent and accessible for transfusion up to, and including, the fourth day of life.
Umbilical cord - Wikipedia, the free encyclopedia (321 words)
In placental mammals, the umbilical cord is a tube that connects a developing embryo or fetus to its placenta.
It contains major arteries and veins (notably two umbilical arteries and umbilical vein, buried within Wharton's jelly) for the exchange of nutrient- and oxygen-rich blood between the embryo and placenta.
The term "umbilical cord" or just "umbilical" has also come to be used for other cords with similar functions, such as the hose connecting a surface-supplied diver to his surface supply of air and/or heating, or a space-suited astronaut to his spacecraft.
  More results at FactBites »

 
 

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