"Bumhole" redirects here. Not to be confused with Bunghole.
This article is about the anuses of humans. For the anuses of other animals, see Anus.
Human anus
The anus of a female with a prominent perineal raphe (left) and a male with anal pubic hair (right)
Scheme of digestive tract, with anus marked
Details
Precursor
Proctodeum
System
Alimentary
Artery
Inferior rectal artery
Vein
Inferior rectal vein
Nerve
Inferior rectal nerves, pudendal nerve
Lymph
Superficial inguinal lymph nodes
Identifiers
Latin
anus
TA98
A05.7.05.013
TA2
3022
FMA
15711
Anatomical terminology
[edit on Wikidata]
Major parts of the
Gastrointestinal tract
Upper gastrointestinal tract
Mouth
Pharynx
Esophagus
Stomach
Duodenum
Lower gastrointestinal tract
Small intestine
Jejunum
Ileum
Large intestine
Cecum
Appendix
Ascending colon
Transverse colon
Descending colon
Sigmoid colon
Rectum
Anus
See also
Gastrointestinal wall
Human digestive system
Anatomical terminology
Outline of anatomy
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In humans, the anus (pl.: anuses or ani; from Latin ānus, "ring", "circle")[1][2] is the external opening of the rectum located inside the intergluteal cleft. Two sphincters control the exit of feces from the body during an act of defecation, which is the primary function of the anus. These are the internal anal sphincter and the external anal sphincter, which are circular muscles that normally maintain constriction of the orifice and which relax as required by normal physiological functioning. The inner sphincter is involuntary and the outer is voluntary. Above the anus is the perineum, which is also located beneath the vulva or scrotum.
In part owing to its exposure to feces, a number of medical conditions may affect the anus, such as hemorrhoids.[3] The anus is the site of potential infections and other conditions, including cancer (see anal cancer).[4]
With anal sex, the anus can play a role in sexuality. Attitudes toward anal sex vary, and it is illegal in some countries.[5] The anus is often considered a taboo part of the body,[5] and is known by many, usually vulgar, slang terms. Some sexually transmitted infections including HIV/AIDS and anal warts can be spread via anal sex.
^Martim de Albuquerque (1873). Notes and Queries. Original from the University of Michigan: Oxford University Press. p. 119.
^O'Reilly, Edward; O'Donovan, John (1864). An Irish-English Dictionary. Original from Oxford University: J. Duffy. p. 7.
^Schubert, MC; Sridhar, S; Schade, RR; Wexner, SD (July 2009). "What every gastroenterologist needs to know about common anorectal disorders". World J Gastroenterol. 15 (26): 3201–09. doi:10.3748/wjg.15.3201. ISSN 1007-9327. PMC 2710774. PMID 19598294.
^"Anal Cancer". The Lecturio Medical Concept Library. Retrieved 24 July 2021.
^ ab"Anal Sex, defined". Discovery.com. Archived from the original on June 13, 2002. Retrieved July 23, 2013.
In humans, the anus (pl.: anuses or ani; from Latin ānus, "ring", "circle") is the external opening of the rectum located inside the intergluteal cleft...
the space between the anus and the genitals. The human perineum is between the anus and scrotum in the male or between the anus and vulva in the female...
is the practice of inserting a piece of skinned ginger root into the humananus in order to generate an acute burning sensation. Historically this was...
Related to the anus of animals: Anal fin, in fish anatomy Anal vein, in insect anatomy Anal scale, in reptile anatomy Related to the humananus: Anal sex,...
An anal piercing is a body piercing in the surrounding area of the humananus, usually the perineum. Despite the name, piercing of the anal sphincter itself...
anal–oral sex) in which one person stimulates the anus of another by using their tongue or lips. The anus has a relatively high concentration of nerve endings...
areas such as the eyes and chin. Vasocongestion of the area around the humananus can lead to the formation of hemorrhoids.[medical citation needed] Vasocongestion...
Reflex anal dilation (RAD) is the reflexive dilation of the humananus to a diameter greater than two centimeters in response to the parting of the buttocks...
the lining of the gut. It is discharged through the anus during a process called defecation. Human feces has similarities to the feces of other animals...
pain, itchiness, or discharge from the anus. A change in bowel movements may also occur. Risk factors include human papillomavirus (HPV), HIV/AIDS, receptive...
countries, the gesture may be interpreted as a vulgar expression resembling a humananus, either as an insult ("You are an asshole"), or an offensive, homophobic...
disease is only known to affect humans. More than 40 types may be spread through sexual contact and infect the anus and genitals. Risk factors for persistent...
raphe across the scrotum and the perineum (area between scrotum and anus). The human penis differs from those of most other mammals, as it has no baculum...
Back passage may refer to: An alley behind, for example, a building A humananus (euphemism) This disambiguation page lists articles associated with the...
The embryological origin of the mouth and anus is an important characteristic, and forms the morphological basis for separating bilaterian animals into...
these are then stored in the rectum until they are expelled through the anus. Endocrine system The endocrine system consists of the principal endocrine...
that leads from the mouth to the anus. The GI tract contains all the major organs of the digestive system, in humans and other animals, including the...
and the coccyx. Male pelvic organs seen from right side. Anatomy of the humananus. Wikimedia Commons has media related to Levator ani muscles. Bulbospongiosus...
like a fictional band; the phrase "Chocolate Starfish" refers to the humananus and Durst himself, who has frequently been called an "asshole". Borland...
separated by an intermediate intergluteal cleft or "crack" in which the anus is situated. The buttocks allow primates to sit upright without resting their...
America, the gesture may be interpreted as a vulgar expression resembling a humananus, referring to sex, either as an insult ("You are an asshole"), or a homophobic...
for an easy score Backdoor Bay, Ross Island, Antarctica Slang for the humananus Backdoor pilot, the use of existing series in assessing potential audience...
The rectum is a continuation of the sigmoid colon, and connects to the anus. The rectum follows the shape of the sacrum and ends in an expanded section...
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