What is the function of the digestive system?

The function of the digestive system is to process food, extracting nutrients and energy, and subsequently eliminating waste products. This system encompasses various organs, including the mouth, esophagus, stomach, intestines, liver, pancreas, and gallbladder. When food enters the digestive tract, it is mechanically broken down and chemically processed, allowing the body to absorb essential nutrients such as carbohydrates, proteins, fats, vitamins, and minerals. After nutrient absorption occurs, the remaining waste is eliminated from the body, ensuring that the digestive system plays a vital role in maintaining overall health and supporting bodily functions.

In contrast, the other choices highlight functions performed by different systems in the body: one relates to the urinary system, another involves the endocrine system, and the last pertains to the respiratory system. Each of these systems has its distinct roles, underscoring the specialized nature of human body systems and how they work together to sustain life.