<prompt> All of the following aeries supply the first 2 cm of the duodenum, EXCEPT?Supraduodenal aeryCommon hepatic aeryGastroduodenal aerySuperior pancreaticoduodenal aery  <response>: The duodenum is supplied by the superior and inferior pancreaticoduodenal aeries, but the first 2 cm receive small branches from a variety of sources:Hepatic aeryCommon hepatic aeryGastroduodenal aerySuperior pancreaticoduodenal aeryRight gastric aeryRight gastroepiploic aeryThis area is clinically impoant because of ulceration. 