The gastrointestinal (GI) system is the part of the body responsible for digestion and the absorption of nutrients from food. It includes the mouth, esophagus, stomach, small intestine, large intestine, rectum, and anus, along with accessory organs such as the liver, pancreas, and gallbladder. The GI tract breaks down food into nutrients that the body can absorb and use for energy, growth, and repair. It also absorbs water and electrolytes while removing undigested waste through bowel movements. A healthy gastrointestinal system is essential for maintaining overall health and proper body function.