Development of Inferior Vena Cava

Development of Inferior vena cava
Inferior vena cava is derived from a series of longitudinal venous channels that appear in the embryo.
Some of these are-
1.Posterior cardinal vein
Caudal ends of these veins receive veins of the lower limb i.e., External iliac and those of the pelvis i.e., Internal iliac
Caudal ends of posterior cardinals are interconnected by a transverse anastomosis
2.Subcardinal veins are formed in relation to the mesonephros (Developing kidneys). Cranially and caudally, they communicate with the posterior cardinals of right as well as left.
At the level of renal veins, intersubcardinal anastomosis develops so as to drain the blood from the left side to the right side as right side is the venous side. Cranial part of right subcardinal vein establishes an anastomosis with the right hepatocardiac channel.
3.Supracardinal veins k/a thoracolumbar veins also communicate cranially and caudally with posterior cardinal veins. They also communicate with subcardinal veins through anastomosis which join subcardinal just below the renal veins.

Many parts disappear to give rise to the inferior vena cava

From cranial to caudal, IVC is derived from 6 segments

1.Lowest part of right posterior cardinal vein
2. Lower part of right supracardinal vein
3. Right supracardinal-subcardinal anastomosis
4. Right sub cardinal vein
5. Subcardinal-hepatocardiac anastomosis
6. Right hepatocardiac channel (Hepatic segment of IVC)

Right common iliac vein is derived from the most caudal part of rt posterior cardinal vein
Left common iliac vein is the anastomosis between the 2 posterior cardinal veins

[mohd.farhansaeed]

Nice lecture..very long time to see you