The role of the cecum in digestion is primarily associated with fermentation and absorption of nutrients. Located at the junction of the small and large intestines, the cecum contains microbial populations that break down complex carbohydrates and fibers that the body cannot digest. In herbivorous animals, such as rabbits and horses, a larger cecum supports greater fermentation, aiding in nutrient extraction and promoting efficient digestion. Overall, the cecum contributes to optimizing nutrient absorption and gut health.