Defekáció

Defekáció is the process by which an organism eliminates solid, semisolid, or liquid waste material from the digestive tract. This waste material is known as feces or stool. The process typically involves the involuntary and voluntary muscles of the digestive system.

The primary organ responsible for the storage of feces is the rectum, the final section of the large intestine. When the rectum becomes sufficiently filled, stretch receptors in its walls are stimulated, sending signals to the brain that trigger the urge to defecate. This urge is a sensation that prompts the individual to seek a suitable location for elimination.

The act of defecation itself involves a coordinated effort. The anal sphincter muscles, which control the opening of the anus, relax. Simultaneously, the abdominal muscles contract, increasing intra-abdominal pressure. This pressure, along with the contraction of the rectal muscles, propels the feces out of the body through the anus.

The frequency and consistency of defecation can vary greatly among individuals and are influenced by factors such as diet, hydration, physical activity, and underlying health conditions. Most healthy adults defecate between three times a day and three times a week. Irregularities in defecation patterns can sometimes indicate digestive issues.