Chevrolet introduced the 2013 Nationwide CAMARO! What do you think?

[TwoLanee]

I think it's about time!
Here's a pic---> http://www.nationwide.nascar.com/video/preview/sound-off/120726/nns-ind-chevrolet-camaro-reveal/index.html
Here's a video of the introduction---> http://www.nationwide.nascar.com/video/preview/sound-off/120726/nns-ind-chevrolet-camaro-reveal/index.html

 

[ScRSC³]

Said it yourself. Its about time.

 

[DaTroller]

Defecation


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For sugar processing, see Sugarcane. For the death metal band, see Defecation (band).

Not to be confused with Deification (disambiguation) or Defection.





16th century drawing of a person defecating in squatting position outside




Conscious and parasympathetic pathways of defecation reflex
Defecation, or defaecation (British English/archaic) (from late Latin defecatio) is the act of 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 in the process called egestion.





Contents
[hide] 1 Defecation cycle
2 Muscular aspects
3 Cardiovascular aspects
4 Neurological aspects
5 Posture aspects
6 Cleaning
7 See also
8 References 8.1 Notes
8.2 Bibliography



[edit] Defecation cycle

In the adult human, the process of defecation, or the defecation cycle, is normally a combination of both voluntary and involuntary processes with force. 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 rectal 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 colon by reverse peristalsis where more water is absorbed, thus temporarily reducing pressure and stretching within the rectum. The additional fecal material is stored in the colon until the next mass 'peristaltic'
as damage to the anal sphincter that may result from an episiotomy, intense fright [3], excessive pressure placed upon the abdomen, inflammatory bowel disease, impaired water absorption in the colon (diarrhea), and psychological[citation needed] or neurological factors.

The loss of voluntary control of defecation is experienced frequently by those undergoing a terminal illness.[4]

[edit] Posture aspects





Defecation in squatting position




Defecation in sitting position
Main article: Defecation posture

\




This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (August 2009)


[edit] Bibliography
Widmaier, Raff, Strang (2006). "Vanders Human Physiology, the mechanisms of body function. Chapter 15. McGraw Hill.







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