Defekálás

Defekálás is the biological process of expelling feces from the body. It is a fundamental aspect of digestion and waste elimination in many animals, including humans. This process typically involves the coordinated action of the digestive tract, specifically the large intestine and rectum, and the external anal sphincter muscles.

The rectum stores feces, which are the semi-solid remains of food that has not been digested in the small intestine and has been fermented by bacteria in the large intestine. When the rectum is sufficiently distended with feces, it triggers a defecation reflex. This reflex involves the relaxation of the internal anal sphincter, an involuntary muscle, and the voluntary relaxation of the external anal sphincter, which is under conscious control. The abdominal muscles also contract to increase intra-abdominal pressure, aiding in the expulsion of feces.

The frequency and consistency of defecation can vary significantly among individuals and are influenced by factors such as diet, fluid intake, physical activity, and overall health. Changes in bowel habits, such as persistent constipation or diarrhea, can sometimes indicate underlying medical conditions and may warrant medical attention. The ability to control defecation is a developmental milestone in humans, typically achieved during early childhood.