Did you mean:

Defecate aus Wikipedia. Zum Beitrag

Defecation - Wikipedia, the free encyclopedia a.new,#quickbar a.new{color:#ba0000} /* cache key: enwiki:resourceloader:filter:minify-css:3:f2a9127573a22335c2a9102b208c73e7 */ Defecation From Wikipedia, the free encyclopedia   (Redirected from Defecate) Jump to: , Not to be confused with Deification (disambiguation). For sugar processing, see Sugarcane. For the death metal band, see Defecation (band). "Poopy Pants" redirects here. For the Captain Underpants villian, see Pippy Poopypants. This article may require cleanup to meet Wikipedia's quality standards. Please improve this article if you can. The talk page may contain suggestions. (October 2010) 16th century drawing of a person defecating in squatting position outside Conscious and parasympathetic pathways of defecation reflex Defecation (from late latin "Defecatio") is the final act of digestion by which organisms eliminate solid, semisolid or liquid waste material (feces) from the digestive tract via the anus. Waves of muscular contraction known as peristalsis in the walls of the colon move fecal matter through the digestive tract towards the rectum. Undigested food may also be expelled this way; this process is called egestion.

Contents

The defecation cycle

In the adult human, the process of defecation, or the defecation cycle, is normally a combination of both voluntary and involuntary processes. The defecation cycle is the interval of time between the completion of one defecation, and the completion of the following defecation. At the start of the cycle, the rectum ampulla (anatomically also: ampulla recti) acts as a temporary storage facility for the unneeded material. As additional fecal material enters the rectum, the rectal walls expand. A sufficient increase in fecal material in the rectum causes stretch receptors from the nervous system located in the rectal walls to trigger the contraction of rectal muscles, relaxation of the internal anal sphincter and an initial contraction of the skeletal muscle of the external sphincter. The relaxation of the internal anal sphincter causes a signal to be sent to the brain indicating an urge to defecate. If this urge is not acted upon, the material in the rectum is often returned to the mehr

Defecate aus Wikipedia. Zum Beitrag