View your list of saved words. (You can log in using Facebook.)
Elimination of feces from the digestive tract. Peristalsis moves feces through the colon to the rectum, where they stimulate the urge to defecate. The rectum shortens, pushing the feces into the anal canal, where internal and external sphincters allow them to be passed or retained. Chest, abdominal, and pelvic muscles are used to pass them. Long delay of defecation causes constipation and hardened feces. See alsodiarrhea, incontinence.
Variants of DEFECATION
defecation or bowel movement
This entry comes from Encyclopædia Britannica Concise. For the full entry on defecation, visit Britannica.com.