MCQ IN MEDICINE

Detailed explanation-1: -The renal vein is formed by the union of two-to-three renal parenchymal veins in the renal sinus. It emerges from the renal hilum anterior to the renal artery and drains into the inferior vena cava at the level of L2.

Detailed explanation-2: -Gonadal vein develops from caudal part of sub-cardinal vein and it drains into the supra-sub cardinal anastomosis. In the right side, this supra-sub cardinal anastomosis and also a small portion of Sub-cardinal vein are incorporated into the formation of IVC, so right gonadal vein usually drains into the IVC.

Detailed explanation-3: -sub·car·di·nal vein-ˈkärd-nəl-, -ᵊn-əl-: a vein in the mammalian embryo or the adult of some lower vertebrates that is located on each side of the abdominal region ventromedial to the mesonephros and that in mammals participates in the formation of the inferior vena cava and the renal vein.