Analysis: Hello: The main function of the large intestine is to absorb water from food in the colon, and move feces to the anus through peristalsis, as well as absorbing a small amount of unabsorbed nutrients from the small intestine. The role of the intestines is mainly digestion and absorption, most of the nutrients are thoroughly digested in the small intestine, such as: starch is digested into glucose, fat is digested into glycerol and fatty acids, and protein is digested into amino acids. Then these small molecules of organic matter in absorbed by the small intestine, and finally into the capillaries. Advice: I hope the above answer can help you.