posterior cardinal vein


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posterior cardinal vein

n.
Any of the major drainage channels from the caudal part of an embryo.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
References in periodicals archive ?
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.
During early development, veins draining the body wall open initially into the posterior cardinal veins. Later these inter-segmental veins drain into the supracardinal 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.
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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