 This is the supine cadaver. I am demonstrating from the right side the camera person is on the left side This structure that we see in front of us This is the inferior vena keva and this structure is the aerota The avatar as we know is to the left of the inferior vena keva now Let's take a look at the inferior vena keva, which I told you is on the right side of the aerota Abdominal extent of the inferior vena keva is much longer than the aerota. The inferior vena keva starts in the abdomen from its Cable height which is at the level of T8 on the right side and it ends at the level of L5 Where it divides into the two common ideacs However, the visible extent of the inferior vena keva is much less than its actual extent Visible extent is only from here to here after it enters into the liver after that the inferior vena keva is not visible Neither is it visible when it goes through the diaphragm neither is it visible when it goes immediately after that into the right So this is actual visible extent of the inferior vena keva The hepatic veins which enter into the inferior vena keva inside the liver are also not visible Tributaries of the inferior vena keva match the Branches of the aerota, but there are some differences For example, the inferior vena keva does not receive any counterpart of the celiac artery or the superior mesentric artery or the inframicentric artery Instead the superior mesentric vein and the inframicentric vein which are the counterparts of these arteries They drain into the portal vein. There is no counterpart of the celiac artery There is distinct renal vein and we can see the renal vein here We can see the left renal vein is much longer than the right renal vein because the inferior vena keva is on the right side and the left renal vein receives The left esticular or the gonadal vein and it also receives the left Supra-renal vein. The left renal vein is also used for Splenorenal shunt because the splenic vein is situated just one centimeter above the left renal vein The left renal vein can get compressed as I mentioned by the superior mesentric artery We can see the vein on this side also and here we can see the renal vein is arising as one trunk And it's immediately dividing into two and entering into the right kidney The inferior vena keva receives the right supra-renal vein However, the left supra-renal vein does not drain into the inferior vena keva Instead as we can see here, it drains into the left renal vein Inferior vena keva, as I mentioned a little while back, receives three hepatic veins inside the liver However, the hepatic artery actually is a branch of the celiac trunk. Now I'm going to show you something very unique I have retracted the inferior vena keva to show the lumbar veins There are four lumbar veins which drain into the inferior vena keva and we can see them on the right side The fifth lumbar vein opens into the external ideal vein and that we can see here This is the fifth lumbar vein These four lumbar veins which we are seeing on the right side They have a communicating vein which runs up like this And it is a very thin walled vein and it is located within the fascia So therefore we have to see it very closely here itself And we can see that vein where it is being traced by my instrument here This is called the ascending lumbar vein which has communications with L4, L3, L2, L1 This ascending lumbar vein as it goes up just below the 12th rib It unites with the subcostal vein and after that on the right side It becomes known as the azygous vein which then enters into the thorax through the aortic hiatus in the diaphragm We have a similar situation occurring on the left side though it is not visible Where instead of azygous vein we have the hemi-azygous vein Which is also formed in exactly the same way And this also enters into the thorax and then at the level of T8 It opens into the azygous vein So we can see the formation, the beginning of the formation of the azygous vein In the form of ascending lumbar vein here This drains the structures in the posterior abdominal wall