Cardinal veins

(redirected from posterior cardinal veins)
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(Anat.) the veins in vertebrate embryos, which run each side of the vertebral column and returm the blood to the heart. They remain through life in some fishes.

See also: Cardinal

References in periodicals archive ?
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.
It is formed between the sixth and eighth weeks of embryonic development via a series of anastomoses and regressions of the following primitive trunk veins: posterior cardinal veins, subcardinal veins and supra cardinal veins.
DISCUSSION: The thoracic embryonic venous system is composed of anterior cardinal veins which drain the cephalic part of the embryo and posterior cardinal veins which drain the caudal part of embryo.

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