What is a major role of the digestive system?

The major role of the digestive system is to ingest and digest food and nutrients. This process involves several stages, starting from the intake of food through the mouth, where it is mechanically broken down by chewing and mixed with saliva to begin the digestive process. As food travels through the esophagus to the stomach, it is further broken down by gastric juices, which help in digesting proteins. The small intestine plays a critical role where the majority of nutrient absorption occurs, allowing the body to obtain vital substances necessary for energy, growth, and cell repair.

This function is essential for maintaining overall health, as it ensures that the body receives the necessary carbohydrates, fats, proteins, vitamins, and minerals that are crucial for various bodily functions. Without proper ingestion and digestion, the body would be unable to sustain itself effectively, leading to deficiencies and health issues.