Renal collar which surrounds the aoa has its two limbs split by:: (A) Left renal vein, (B) Left renal aery, (C) Isthmus of horseshoe kidney, (D) All of the above
Answer is A. Renal collar The main renal vein divides and sends one limb anterior and another limb posterior to aoa to reach the IVCQ. Formed on the left side and represent persistence of the embryonic state.