Defecation is the physiological process of eliminating solid waste material, feces, from the body via the rectum and anus. This process is the final stage of gastrointestinal transit, designed to remove indigestible substances, dead cells, bacteria, and metabolic byproducts that have been processed by the digestive tract. The mechanism involves complex motility patterns, including peristalsis, which propels the material toward the colon and rectum. Proper elimination relies on coordinated function among the intestinal musculature, the enteric nervous system, and the autonomic nervous system. The regulation of defecation is crucial for maintaining systemic balance and is monitored in health science through the assessment of bowel function and the analysis of stool consistency, which can indicate various digestive system conditions.