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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. It may be continuous with the round ligament of liver. It is invested by the peritoneal folds of the lesser omentum within a ...
After it closes, the remnant is known as ligamentum venosum. If the ductus venosus fails to occlude after birth, it remains patent (open), and the individual is said to have a patent ductus venosus and thus an intrahepatic portosystemic shunt (PSS). [4] This condition is hereditary in some dog breeds (e.g. Irish Wolfhound).
The ligamentum arteriosum plays a role in major trauma. It fixes the aorta in place during abrupt motions, consequently potentially resulting in a ruptured aorta. Such ruptures are very rare. If the ductus arteriosus fails to close after birth, a condition known as patent ductus arteriosus can develop. This is a fairly common birth defect.
It occupies the right hypochondrium, on its posterior surface by the ligamentum venosum for the cranial (upper) half and by the ligamentum teres hepatis (round ligament of liver) for the caudal (under) half. The ligamentum teres hepatis turns around the inferior margin of the liver to come out ventral in the falciform ligament.
The fetal circulatory system includes three shunts to divert blood from undeveloped and partially functioning organs, as well as blood supply to and from the placenta. In humans, the circulatory system is different before and after birth. The fetal circulation is composed of the placenta, umbilical blood vessels encapsulated by the umbilical ...
A ligament is the fibrous connective tissue that connects bones to other bones. It is also known as articular ligament, articular larua, [1] fibrous ligament, or true ligament. Other ligaments in the body include the: Peritoneal ligament: a fold of peritoneum or other membranes. Fetal remnant ligament: the remnants of a fetal tubular structure.
Ductus arteriosus. The fetal circulatory system, with the ductus arteriosus visible at upper right. The ductus arteriosus, also called the ductus Botalli, named after the Italian physiologist Leonardo Botallo, is a blood vessel in the developing fetus connecting the trunk of the pulmonary artery to the proximal descending aorta.
The liver, viewed from above, showing the left and right lobes separated by the falciform ligament. The liver is a dark reddish brown, wedge-shaped organ with two lobes of unequal size and shape. A human liver normally weighs approximately 1.5 kilograms (3.3 pounds) [11] and has a width of about 15 centimetres (6 inches). [12]