What is the main function of the small intestine?

The main function of the small intestine is indeed to absorb nutrients from digested food. This part of the digestive system is specifically designed with a large surface area, aided by tiny structures called villi and microvilli, which greatly increase the area available for absorption. As food passes through the small intestine, it mixes with digestive enzymes and bile, breaking down complex molecules into simpler forms that can be easily absorbed into the bloodstream.

In contrast, while the storage of food occurs in the stomach and the elimination of waste is handled primarily by the large intestine, the small intestine plays a critical role in converting food into usable nutrients. Although there are some digestive enzymes produced by the pancreas and other glands that aid in digestion, the primary function of the small intestine is nutrient absorption, making it essential for maintaining the body’s energy and health.