The gastrointestinal (GI) system, also known as the digestive system, plays crucial roles such as digestion, absorption, elimination, and immune response. It breaks down food and absorbs nutrients int...The gastrointestinal (GI) system, also known as the digestive system, plays crucial roles such as digestion, absorption, elimination, and immune response. It breaks down food and absorbs nutrients into the bloodstream, which are essential for growth, energy, and bodily processes. Disorders affecting the digestive system's function can significantly impact health and well-being and elevate the risk of chronic conditions. Proper nutrition is vital for overall health.