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azygous |
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azygous
[az′əgəs] Etymology: Gk, a + zygon, not yoke occurring as a single entity or part, such as any unpaired anatomic structure; not part of a pair. Also azygos. -azygos [az′əgos′] , n. azygos [az´ĭ-gos] any unpaired part, as the azygos vein. azygos vein a vein beginning in the abdomen as a continuation of the ascending lumbar vein; it and its tributaries serve as vessels for the return of blood from the thorax to the superior vena cava. The azygos vein also serves as a connecting link, through the ascending lumbar vein, between the venae cavae returning blood from above and below the heart. See anatomic Table of Veins in the Appendices.
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