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The unpaired umbilical vein carries oxygen and nutrient rich blood derived from fetal-maternal blood exchange at the chorionic villi.More than two-thirds of fetal hepatic circulation is via the main portal vein, while the remainder is shunted from the left portal vein via the ductus venosus to the inferior vena cava, eventually being delivered to the fetal right atrium.
The round ligament of the liver is the remnant of the umbilical vein during embryonic development. [1] It only exists in placental mammals. [4] After the child is born, the umbilical vein degenerates to fibrous tissue.
Protrusion: The umbilical cord remnant is completely divulged, exposing the full umbilical scar. Circlet: Although the entirety of the umbilical cord remnant sits out with the umbilical collar, the centre of the knot is inset by a deep fissure. Unlike a split outie, in this form the fissure is contained centrally and does not extend past the ...
The findings suggest deferred clamping of the umbilical cord likely reduced the risk of death in premature babies by a third, compared to immediate clamping.
The ligamentum venosum, also known as Arantius' ligament, [1] is the fibrous remnant of the ductus venosus of the fetal circulation.Usually, it is attached to the left branch of the portal vein within the porta hepatis.
The pathway of fetal umbilical venous flow is umbilical vein left portal vein ductus venosus inferior vena cava eventually right atrium.. This anatomic course is important to recall when assessing the success of neonatal umbilical venous catheterization, as failure to cannulate through the ductus venosus results in malpositioned hepatic catheterization via the left or right portal veins.
Due to the increase in venous congestion, blood is pushed down from the liver towards the anterior abdominal wall and if blood pools here, will result in dilatation of veins around the umbilicus. If these veins radiate out from the umbilicus, they can give the appearance of a head (the umbilicus) with hair of snakes (the veins) – this is ...
This opposed the more commonly accepted opinion that the umbilical fissure divided the liver. [2] The portal vein was already known to divide near the porta hepatis, as described by Francis Glisson in Anatomia hepatis, but Cantlie was the first to propose that the liver could be functionally divided into separate, distinct left and right halves.