Srání

Srání, commonly known as defecation or a bowel movement, is the final act of digestion in many animals, including humans. It involves the expulsion of feces from the body through the anus. Feces are the waste product of digestion, consisting of undigested food material, bacteria, mucus, and shed intestinal cells. The process of srání is typically involuntary, controlled by reflexes in the autonomic nervous system, but can also be consciously initiated.

The frequency and consistency of srání vary significantly among individuals and can be influenced by diet, hydration levels, physical activity, and underlying health conditions. A healthy bowel pattern is often considered to be anywhere from three times a day to three times a week. Changes in bowel habits, such as persistent diarrhea or constipation, or the presence of blood in the stool, can be indicative of medical issues and may warrant professional medical attention.

The anatomical structures involved in srání include the intestines, rectum, and anus. The large intestine absorbs water and electrolytes from the remaining indigestible food matter and transmits the useless waste material from the body. When the rectum is sufficiently filled, stretch receptors are activated, triggering the urge to defecate. The internal and external anal sphincters, muscles that control the opening and closing of the anus, relax to allow for the passage of feces.