The function of the digestive system is to break down food and absorb nutrients essential for the body's energy, growth, and repair. It includes organs such as the mouth, esophagus, stomach, intestines, liver, and pancreas, each playing a specific role in breaking down complex food into simpler molecules. The process begins with mechanical and chemical digestion in the mouth and stomach, followed by nutrient absorption in the small intestine. Waste products are then eliminated through the large intestine. Overall, the digestive system facilitates the transformation of food into the energy required for daily functioning.