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sinus venosus

 

Definition: a cavity at the caudal end of the embryonic cardiac tube in which the veins from the intraembryonic and extraembryonic circulatory arcs unite; in the course of development, it forms the portion of the right atrium known in adult anatomy as the sinus of the vena cava.

Synonym(s): saccus reuniens

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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