The large intestine is the final section of the gastrointestinal tract, serving critical roles in digestion and waste elimination. Structurally, it is composed of the cecum, colon, rectum, and anal canal. Its primary functions include the absorption of water and electrolytes from the remaining indigestible contents, which solidifies the fecal matter. Furthermore, the large intestine is home to a vast and complex microbiota, the symbiotic bacterial population that plays an essential role in metabolic processes, including the synthesis of certain vitamins. Regular peristaltic movements propel the processed material toward the rectum for eventual excretion.