Development of IVC (Inferior Vena cava) | Cardinal Veins | Embryology

Segmental development of IVC.
Embryology of inferior vena cava.
What are the Subcardinal & Supracardinal veins?
What is the fate of cardinal veins of embryo?
The inferior vena cava forms during a series of changes in the primordial veins of the trunk. Blood returning from the caudal part of the embryo is shifted from the left to the right side of the body. The IVC is composed of five main segments:
1. Union of right posterior cardinal vein with anastomotic channel of left cardinal vein
2. A postrenal segment derived from the right supracardinal vein
3. A renal segment derived from the subcardinal-supracardinal anastomosis
4. A prerenal segment derived from the right subcardinal vein
5. A hepatic segment derived from the hepatic vein (proximal part of right vitelline vein) and hepatocardiac channel
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