<prompt> Which of the following is anteriorly related to the third pa of duodenumPoal veinHead of pancreasHepatic aerySuperior mesenteric vein  <response>: Superior mesenteric vein and aery cross the anterior to the third pa of the duodenum to enter the mesentry of small intestine. Head of pancreas is in superior relation Anteriorly : Small bowel mesentry root and superior mesenteric aery. Posteriorly: Right psoas muscle, right ureter, gonadal vessels, aoa and IVC. Ref: Grays Anatomy 41st edition Pgno: 1156 