The term "S자결장" refers to the "sigmoid colon," which is a part of the large intestine. It is shaped like an "S" and connects the descending colon to the rectum. The sigmoid colon plays a crucial role in the digestive system by storing fecal waste until it is ready to be expelled from the body. This section of the intestine is important for the absorption of water and electrolytes. Issues with the sigmoid colon can lead to conditions such as diverticulitis or colorectal cancer, making it essential for maintaining overall digestive health. Regular check-ups can help monitor its condition.