<prompt> Which is the water shed area of inferior mesenteric artery and internal iliac artery?Griffiths pointSigmoid colonAno rectal junctionSudecks point  <response>: Ans. D Sudecks pointRef: Yamadas Textbook of Gastroenterology, Vol I, P 104 Watershed area: It is the medical term referring to regions of the body that receive dual blood supply from the most distal branches of two large arteries. Griffiths critical point: A potential watershed area present between superior and inferior mesenteric arterial system. It is located at the splenic flexure. Sudecks point: Located at the watershed area between inferior mesenteric artery and internal iliac artery. This point is located near the rectosigmoid junction. 