<prompt> Watershed zone of large intestine -CecumAscending colonRectosigmoidTransverse colon  <response>: Ans. is c i.e.. Rectosigmoid o There are areas of colon with poor blood supply resulting from incomplete anastomosis of marginal arteries. These are watershed areas of colon and include :1. Splenic flexure Griffith point: Watershed area between superior mesenteric artery and inferior mesenteric artery.2. Rectosigmoid junction Sudecks point : Watershed zone between inferior mesenteric artery and internal iliac artery. 