cardinal vein


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

cardinal vein

Along with the umbilical and the vitelline veins, the cardinal veins form one of the three venous systems of the early embryo. The cardinal veins return blood to the heart from the body of the embryo, and they are the precursors of the major thoracic veins, including the subclavian, brachiocephalic, azygos, internal jugular veins, and the superior vena cava.
See also: vein
References in periodicals archive ?
During early development, veins draining the body wall open initially into the posterior cardinal veins.
The renal segment of the IVC is formed by the confluence of these two systems, that is, suprasubcardinal and postsubcardinal anastomoses, named renal collar, which is followed by the atrophy of the posterior cardinal veins.
Embryologically, the systemic veins of our body develop from the intra-embryonic anterior and posterior cardinal veins, while the portal system develops from the extra-embryonic vitelline and umbilical veins which drain from the yolk sac and the placenta.
Duplication of IVC arises as a result of the persistence of the right and left supra cardinal and sub cardinal veins (2).