The rectum is the final part of the large intestine in the human body. It serves as a storage area for feces before they are expelled during a bowel movement. The rectum is about 12 centimeters long and connects the colon to the anus, playing a crucial role in the digestive system. When the rectum fills with stool, it sends signals to the brain, indicating the need to go to the bathroom. This process helps maintain regular bowel habits and ensures that waste is eliminated efficiently. Proper function of the rectum is essential for overall digestive health.