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cardinal vein

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Noun1.cardinal vein - any of the major venous channels in primitive adult vertebrates and in embryos of higher vertebrates
anterior cardinal vein - a major drainage channel from the cephalic part of the body
posterior cardinal vein - a major drainage channel from the caudal part of the body
common cardinal vein - the major return channels to the heart; formed by anastomosis of the anterior and posterior cardinal veins
vein, vena, venous blood vessel - a blood vessel that carries blood from the capillaries toward the heart; "all veins except the pulmonary vein carry unaerated blood"


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They result from the failure of regression of the right supra-cardinal vein and left anterior cardinal vein, respectively (1-4).
During normal development, the anterior cardinal veins, which drain the head, neck, and arm, unite with the posterior cardinal vein in the very early embryonic stage and enter the heart as the right and left horns of the sinus venosus.
 
 
 
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