What is "sigmoid colon"?

The sigmoid colon is the S-shaped segment of the large intestine located just before the rectum in the human body. It connects the descending colon to the rectum and plays a crucial role in the final stages of the digestive process. The sigmoid colon is responsible for the absorption of water, electrolytes, and nutrients from the remaining digested material. Its muscular walls facilitate the propulsion of waste material toward the rectum for elimination. The sigmoid colon's shape and flexibility allow it to accommodate and store fecal matter until it is ready to be expelled during a bowel movement.