The sigmoid colon is a part of the large intestine located between the descending colon and the rectum. It is shaped like an "S" and serves as a storage area for feces before they are expelled from the body. The sigmoid colon plays a crucial role in the digestive process by absorbing water and electrolytes. This section of the colon is typically about 15 to 20 inches long. It is named "sigmoid" due to its curved shape. Problems in the sigmoid colon, such as diverticulitis or colon cancer, can lead to various digestive issues and may require medical attention.