relationship loss: part_of cardinal system (TAO:0000096)[TAO], relationship loss: part_of axial vasculature (TAO:0001073)[TAO]

join with the corresponding right and left cardinal veins to form the left common cardinal veins, which empty in the sinus venosus. Most of the posterior cardinal veins regress, what remains of them forms the renal segment of the inferior vena cava and the common iliac veins. Later in the development stages, the posterior cardinal veins are replaced by the subcardinal and supracardinal veins. The subcardinal veins form part of the inferior vena cava, renal veins and gonadal veins. The supracardinal veins form part of the inferior vena cava, the intercostal veins, hemiazygos vein and azygos vein

Either of two veins which receive blood as an alternate route from the kidneys.[AAO], Continuation of the caudal vein cranial to the anal pore. The cardinal vein splits into a pair of vessels in the cranial trunk, just caudal to the radix of the aorta. The posterior cardinals each empty into the common cardinal vein. [TAO]

uberon

caudal cardinal veins, PCV, axial vein, postcardinal vein, inferior cardinal vein

In primitive vertebrates, the basic early embryonic pattern is retained, and blood from anterior and posterior systemic tissues is returned in anterior and posterior cardinal veins, both pairs of veins uniting in common cardinal veins near the heart. In derived vertebrates, the cardinals appear but usually persist only in the embryo, being functionally replaced by alternative adult vessels, the precava and postcava (anterior and posterior venae cavae).[well established][VHOG]

UBERON:0002065

• thoracic duct