Defecation (or defaecation) follows digestion and is the necessary biological process by which organisms eliminate a solid, semisolid, or liquid waste material known as feces (or faeces) …

Dec 16, 2025 · Defecation, the act of eliminating solid or semisolid waste materials (feces) from the digestive tract. In human beings, wastes are usually removed once or twice daily, but the …

When defecation proceeds, signals cause strong contractions in the colon and rectum, propelling feces toward the anus. Simultaneously, the external anal sphincter is voluntarily relaxed, and …

Nov 13, 2023 · The process begins with mass movement from the colon to the rectum, initiating the defecation reflex, which involves rectal contraction and internal and external anal sphincter …

Aug 12, 2023 · Explore the physiology of defecation, including gastrointestinal motility, rectal filling and sensation, the defecation reflex, and factors affecting bowel movements. Understand the …

Jul 12, 2025 · Defecation is a complex physiological process that involves the coordinated function of various anatomical structures and neural mechanisms. It is the process of waste …

When undigested material reaches the distal colon and rectum it triggers a coordinated series of events known collectively as the defecation reflex. As the rectum fills, its walls stretch and …