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Anus
Anorectum.gif
Diagram of rectum and anus
.The anus is an opening at the opposite end of an animal's digestive tract from the mouth.^ The digestive tract as a whole is a hollow tube that extends from the mouth to the anus.
  • Spinal Cord Injury Bowel Management & Programs 15 September 2009 4:25 UTC www.sci-info-pages.com [Source type: General]

.Its function is to control the expulsion of feces, unwanted semi-solid matter produced during digestion, which, depending on the type of animal, may be one or more of: matter which the animal cannot digest, such as bones;[1] food material after all the nutrients have been extracted, for example cellulose or lignin; ingested matter which would be toxic if it remained in the digestive tract; and dead or excess gut bacteria and other endosymbionts.^ Monitor your diet for any foods that may over stimulate your bowel, such as spicy foods.
  • Spinal Cord Injury Bowel Management & Programs 15 September 2009 4:25 UTC www.sci-info-pages.com [Source type: General]

^ Does one group have more bladder and bowel problems than the others?

^ The primary work of the lower urinary tract and the colon is the storage of urine and waste, respectively, until such time as the expulsion of urine or feces is appropriate.
  • Artificial Sphincter Insertion - Definition, Purpose, Demographics, Description, Diagnosis/Preparation, Aftercare, Normal results, Morbidity and mortality rates, Alternatives, Resources 15 September 2009 4:25 UTC www.surgeryencyclopedia.com [Source type: FILTERED WITH BAYES]

.Amphibians, reptiles, and birds use the same orifice for excreting liquid and solid wastes, and for copulation and egg-laying; this orifice is known as the cloaca.^ Both exercise and pessary use can help women with stress incontinence but it is not known which treatment is better, or if a combination of the two treatments at the same time is best.

Monotreme mammals also have a cloaca, which is thought to be a feature inherited from the earliest amniotes via the therapsids. .Marsupials have two nether orifices: one for excreting both solids and liquids; the other for reproduction, which appears as a vagina in females and a penis in males.^ Both male and female can get this intestinal yeast.
  • my butt is leaky | PoopReport.com 15 September 2009 4:25 UTC www.poopreport.com [Source type: Original source]

^ This is caused by one (or both) of two conditions; 1)Irritable Bowel Syndrome(IBS) or a backed up colon needing cleansing.
  • my butt is leaky | PoopReport.com 15 September 2009 4:25 UTC www.poopreport.com [Source type: Original source]

.Female placental mammals have completely separate orifices for defecation, urination, and reproduction; males have one opening for defecation and another for both urination and reproduction, although the channels flowing to that orifice are almost completely separate.^ Also persistence of cloaca (bladder, genital tract and bowel empty into single narrow channel that opens onto perineum with small orifice) .

The development of the anus was an important stage in the evolution of multicellular animals. In fact it appears to have happened at least twice, following different paths in protostomes and deuterostomes. .This accompanied or facilitated other important evolutionary developments: the bilaterian body plan; the coelom, an internal cavity that provided space for a circulatory system and, in some animals, formed a hydrostatic skeleton which enables worm-like animals to burrow; metamerism, in which the body was built of repeated "modules" which could later specialize, for example the heads of most arthropods are composed of fused, specialized segments.^ For some forms of mild fecal incontinence, special forms of exercise can help to strengthen and tone the pelvic floor muscles, along with providing biofeedback to train the muscles to work with an appropriate schedule.
  • Artificial Sphincter Insertion - Definition, Purpose, Demographics, Description, Diagnosis/Preparation, Aftercare, Normal results, Morbidity and mortality rates, Alternatives, Resources 15 September 2009 4:25 UTC www.surgeryencyclopedia.com [Source type: FILTERED WITH BAYES]

^ The internal anal sphincter provides most of the resting anal tone that is essential for maintaining continence.
  • Repair of Obstetric Perineal Lacerations - October 15, 2003 - American Family Physician 15 September 2009 4:25 UTC www.aafp.org [Source type: Academic]

Development

In animals at least as complex as an earthworm, the embryo forms a dent on one side, the blastopore, which deepens to become the archenteron, the first phase in the growth of the gut. .In deuterostomes, the original dent becomes the anus while the gut eventually tunnels through to make another opening, which forms the mouth.^ A bowel movement happens when the rectum (last portion of the bowel) becomes full of stool and the muscle around the anus (anal sphincter) opens.
  • Spinal Cord Injury Bowel Management & Programs 15 September 2009 4:25 UTC www.sci-info-pages.com [Source type: General]

.The protostomes were so named because it used to be thought that in their embryos the dent formed the mouth while the anus was formed later, at the opening made by the other end of the gut.^ ERUS can also be used in cases of anal fistula (an abnormal passage) and problems with the anal sphincter muscles (muscles that control the opening and closing of the anus).
  • Endorectal Ultrasound - definition of Endorectal Ultrasound in the Medical dictionary - by the Free Online Medical Dictionary, Thesaurus and Encyclopedia. 15 September 2009 4:25 UTC medical-dictionary.thefreedictionary.com [Source type: Academic]

.More recent research, however, shows that in protostomes the edges of the dent close up in the middle, leaving openings at the ends which become the mouth and anus.^ A bowel movement happens when the rectum (last portion of the bowel) becomes full of stool and the muscle around the anus (anal sphincter) opens.
  • Spinal Cord Injury Bowel Management & Programs 15 September 2009 4:25 UTC www.sci-info-pages.com [Source type: General]

^ My problem is excessive sweating – so much that it leaves my underwear damp, and the wet spots sometimes show up on the back of my pants.
  • my butt is leaky | PoopReport.com 15 September 2009 4:25 UTC www.poopreport.com [Source type: Original source]

[2]

Physiology

.Flow of substance through the anus is typically controlled by the anal sphincter muscle.^ Traditionally, an end-to-end technique is used to bring the ends of the sphincter together at each quadrant (12, 3, 6, and 9 o'clock) using interrupted sutures placed through the capsule and muscle (Figure 12).
  • Repair of Obstetric Perineal Lacerations - October 15, 2003 - American Family Physician 15 September 2009 4:25 UTC www.aafp.org [Source type: Academic]

^ These holding and expelling functions in each system require a delicate balance of tension and relaxation of muscles, especially those related to conscious control of the act of urination or defecation through the valve-like sphincter in each system.
  • Artificial Sphincter Insertion - Definition, Purpose, Demographics, Description, Diagnosis/Preparation, Aftercare, Normal results, Morbidity and mortality rates, Alternatives, Resources 15 September 2009 4:25 UTC www.surgeryencyclopedia.com [Source type: FILTERED WITH BAYES]

^ The purpose of the CAPS Imaging Study is to learn more about how the pelvic muscles and anal sphincter muscles work after childbirth.

Notes

  1. ^ Chin, K., Erickson, G.M. et al (1998-06-18). "A king-sized theropod coprolite". Nature 393: 680. doi:10.1038/31461. http://www.nature.com/nature/journal/v393/n6686/abs/393680a0.html.  Summary at Monastersky, R. (1998-06-20). "Getting the scoop from the poop of T. rex". Science News 153 (25): 391. doi:10.2307/4010364. http://www.sciencenews.org/pages/sn_arc98/6_20_98/fob2.htm. 
  2. ^ Arendt, D., Technau, U., and Wittbrodt, J. (4 January 2001). "Evolution of the bilaterian larval foregut". Nature 409: 81–85. doi:10.1038/35051075. http://www.nature.com/nature/journal/v409/n6816/full/409081a0.html. Retrieved 2008-07-14. 

Wiktionary

Up to date as of January 15, 2010

Definition from Wiktionary, a free dictionary

See also anus, and -anus

German

Noun

Anus m
  1. anus

Synonyms


Simple English

The English Wiktionary has a dictionary definition (meanings of a word) for:

The anus is the opening in the human body that is between the buttocks. It is at the end of the gastrointestinal system (including the organs that digest food), where waste (called feces, shit, poop, or stool) comes out of the body.

The English Wiktionary has a dictionary definition (meanings of a word) for:

The anus is the opening in the human body that is between the buttocks. It is at the end of the gastrointestinal system (including the organs that digest food), where waste (called feces, shit, poop, or stool) comes out of the body.

Related pages


bjn:Kalimut

Citable sentences

Up to date as of December 21, 2010

Here are sentences from other pages on Anus, which are similar to those in the above article.








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