2025 Nursing Entrance Test Practice Exam – Complete Study Resource

The main function of the digestive system is to break down food and absorb nutrients. This intricate system involves several organs that work together to process the food we consume. When food enters the mouth, it is mechanically broken down by chewing and mixed with saliva, initiating the digestion process.

As food travels down the esophagus to the stomach, it undergoes further breakdown through mechanical and chemical means. In the stomach, digestive acids and enzymes play a crucial role in transforming food into a semi-liquid form known as chyme. This chyme then moves into the small intestine, where most nutrient absorption occurs. The small intestine is lined with villi, small fingerlike projections that increase the surface area for absorption, allowing nutrients like carbohydrates, proteins, fats, vitamins, and minerals to enter the bloodstream.

The digestive system ultimately ensures that the body receives the essential nutrients needed for energy, growth, and cell repair. Thus, breaking down food and absorbing nutrients is fundamental to maintaining overall health and homeostasis in the body.