What is the main role of the colon in the digestive system?

The primary function of the colon, also known as the large intestine, is to absorb water and electrolytes from indigestible food matter and to form waste products into feces. As food moves through the digestive tract, nutrients and a significant amount of water are absorbed in the small intestine, but the remaining waste, which still contains a considerable amount of water, enters the colon. Here, the colon's walls reclaim the water, helping to solidify waste for elimination. Additionally, the colon is home to a rich community of bacteria that aid in the fermentation of undigested materials, further contributing to the formation of feces. This process is crucial for maintaining the body’s hydration and electrolyte balance, making the colon's role essential in the overall digestive system.