The cecum is a pouch-like structure located at the beginning of the large intestine, specifically at the junction where the small intestine meets the large intestine. It plays a crucial role in the digestive system by serving as a reservoir for undigested food material. The cecum is also connected to the appendix, a small tube that extends from it, which may have immune functions. In humans, the cecum is about 6 to 8 centimeters long and is situated in the lower right abdomen. It helps in the absorption of fluids and salts that remain after the digestion of food. The cecum is an important part of the gastrointestinal tract, contributing to the overall process of digestion and waste elimination.