Anatomy The mesentery of small intestine, along its attachment to the posterior abdominal wall, crosses all of the following structures except: A Left gonadal vessels B Third pa of duodenum. C Aoa D Right ureter. 💡 Explanation The mesentery of small intestine, along its attachment to the posterior abdominal wall, crosses all of the following structures except: ✓ Correct Answer: A. Left gonadal vessels