You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Watershed zone of large intestine - and explain in detail?
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 (Sudeck's point) : Watershed zone between inferior mesenteric artery and internal iliac artery.