What type of digestion occurs mainly in the small intestine?

The primary process of digestion that occurs in the small intestine is chemical digestion. This phase is characterized by the breakdown of food into its nutrient components through enzymatic action. Enzymes produced by the pancreas and the lining of the small intestine itself play a crucial role in this process. They break down carbohydrates, proteins, and fats into smaller molecules that can be absorbed into the bloodstream. The presence of bile, which aids in the emulsification of fats, further supports the chemical digestion happening in this part of the digestive tract.

While mechanical digestion does occur in the small intestine, such as the mixing of food through peristalsis and segmentation, it is not the primary focus there. Instead, the main function of the small intestine is to enable efficient absorption of nutrients, which requires the chemical breakdown of food substances. Therefore, specifying chemical digestion reflects the main digestive activity occurring in this segment of the gastrointestinal tract.