Anus: Difference between revisions

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			aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanus!!! That's where poo comes from. Poo is made up of a lot of stupid shit heads becoming one big shit head and rotting for several days before becoming a poo. Heh I said poo. Heh........lol.........Sir Crapalot. Lol. lolololololololololololololololololololololololololololololololololololol. lol. Burger king!!!!!!!!!!! thrrrrrrrrrrrrrrrrrrrrrrp <-- Dirty fart.
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	{{otheruses1\|the bodily orifice}}
	{{redirect\|Anal}}

	In ], the '''anus''' (from ] ''ānus'' "ring, anus") is the external opening of the ]. Closure is controlled by ] ]s. ] are expelled from the body through the anus during the act of ], which is the primary function of the anus. Most animals — from simple worms to elephants and humans — have a tubular ], with a ] at one end and an anus at the other.

	The anus is often considered a ] part of the body, and is known by a large number of usually ] ] terms.

	== Structure ==
	The human anus is situated between the ]s, ] to the ]. It has two anal sphincters, one ], the other ]. These hold the anus closed until time to defecate.<!-- or time for sexual activity.--> One sphincter consists of smooth muscle and its action is involuntary; the other consists of striated muscle and its action is voluntary. In many animals, the anus is surrounded by ].

	== Role in defecation ==
	{{main\|Defecation}}

	When the ] is full, the increase in intrarectal pressure forces the walls of the ] apart allowing the fecal matter to enter the canal. The rectum shortens as material is forced into the anal canal and peristaltic waves propel the feces out of the rectum. The internal and external sphincters of the anus allow the feces to be passed by muscles pulling the anus up over the exiting feces.

	To prevent diseases of the anus and to promote general hygiene, humans often clean the anus after emptying the bowels. A wash with a ] or a wiping with ] are often used to clear the anus of fecal matter.

	== Role in sexuality ==
	{{main\|Anal sex}}

	The anus has a relatively high concentration of ]s and is an ]. ]'s theory of ], for example, described an ], hypothesizing that toddlers derive pleasure from retaining and expelling feces. This is the source of the term "anal" and the derived, ] vulgarism "]."

	] can be pleasurable for both the insertive partner and the receptive partner. For the receptive partner, pleasure from anal intercourse is also thought to be related to the shared wall between the rectum and the ] (for females) as well as the ] or ] (for males). For the insertive partner, the tightness of the anus is often said to be a source of pleasure in penetrative anal sex.

	Anal intercourse, sometimes referred to as ] or ], is a human sexual activity, but is considered ] in a number of moral systems, and it has been, and in some ] continues to be, a crime carrying severe punishment.

	Anal sexual activity need not include penetration. The anus also plays an important role in ], ] and ].

	] can stimulate the nerves around the anus and can be considered pleasurable. Care must be taken to maintain elasticity.

	==Puberty==
	During ], as testosterone triggers ] growth on the body, pubic hair begins to appear around the anus. Although initially sparse, it fills out by the end of puberty, if not earlier.

	==Health==
	]
	Hygiene is important for good anal health and anal sex. Washing with a mild soap and water will keep the anus clean. Harsh soaps or wiping vigorously with toilet paper can irritate the skin around the anus, making it itchy or sore. ] are sometimes the source of ].

	Care should be taken not to strip the anus of natural oils that keep the skin around the opening supple and elastic.

	Penetration with a penis or sex toy can irritate or tear the inside of the anus. Lubrication is often recommended to ease penetration.
	The risk of injury to the anal sphincter should be a concern, which can lead on to lack of control of defecation and fecal incontinence. Similarly if the anus is torn, this can occasionally cause a fistula formation which can not only cause fecal leaking, but also can be very difficult to treat.

	]s can improve the tone of the outer sphincter muscle.

	==Cosmetics==
	Shaving, trimming, ], or ] can clear the perineum of hair.

	] is a process which phenomenon where the perineum, which darkens over the years,{{fact}} is lightened for a more youthful appearance.

	] is among the more extreme piercings and usually interferes with the function of the anus.

	== Pathology ==
	], ], ], ], ], ] and ] are among the diseases of the anus that benefit from medical intervention. Birth defects of the anus include ] and ]. The anus is also a frequent site of ]s.
	Damaged ] (] in more severe cases) — caused by careless surgery in the ] region or by rough/abrupt penetration in ] — can lead to ] and/or ], chronic ] and, ultimately, ].

	In ] the ]ian term ] is used.

	==Additional images==
	<gallery>
	Image:Illu female genitalia.jpg\|Female external genitalia.
	Image:Gray406.png\|Muscles of male perineum.
	Image:Gray408.png\|Muscles of the female perineum.
	</gallery>

	==See also==
	{{wiktionarypar\|anus}}
	* ]
	* ]
	* ]
	* ]
	* ]
	* ]
	* ] (Freudian psychosexual stage)

	== External links ==
	* Patient Queries answered by Physicians and Gastroenterologists pertaining to problems of the Anus

	{{digestive system}}
	{{human anatomical features}}

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Revision as of 13:26, 18 December 2006

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanus!!! That's where poo comes from. Poo is made up of a lot of stupid shit heads becoming one big shit head and rotting for several days before becoming a poo. Heh I said poo. Heh........lol.........Sir Crapalot. Lol. lolololololololololololololololololololololololololololololololololololol. lol. Burger king!!!!!!!!!!! thrrrrrrrrrrrrrrrrrrrrrrp <-- Dirty fart.