What is a primary function of the digestive system?

The primary function of the digestive system is to break down food for nutrient absorption. This complex process involves multiple organs that work together to transform ingested food into smaller, absorbable molecules. The digestive system not only includes the breakdown of food through mechanical processes like chewing but also through chemical processes facilitated by digestive enzymes. Once food is broken down into nutrients, these can be absorbed into the bloodstream, which allows the body to utilize them for energy, growth, and repair.

While transporting waste products is a function of the digestive system, it is not its primary role; instead, it is a final step in the digestive process. Regulating body temperature is a function primarily related to the body's thermoregulatory systems rather than digestion. Producing enzymes is important for digestion but serves more as a supporting role within the broader function of breaking down food. Overall, nutrient absorption is central to the digestive system's purpose, making that option the most accurate representation of its primary function.