rectum

Also known as rectal

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Key facts

Anatomy.Name: Rectum
Anatomy.part_of: Large intestine
Anatomy.system: Gastrointestinal system
Anatomy.Latin: rectum intestinum
Anatomy.Image: Rectum anatomy en.svg
Anatomy.Caption: Anatomy of the human rectum
Anatomy.Image2: Tractus intestinalis rectum.svg
Anatomy.Caption2: Scheme of digestive tract, with rectum marked
Anatomy.Precursor: Hindgut
Anatomy.Artery: Superior rectal artery (first two-thirds of rectum), middle rectal artery (last third of rectum)
Anatomy.Vein: Superior rectal veins, middle rectal veins
Anatomy.Nerve: Inferior anal nerves, inferior mesenteric ganglia
Anatomy.Lymph: Inferior mesenteric lymph nodes, pararectal lymph nodes, internal iliac lymph nodes, deep inguinal lymph nodes
Anatomy.Function: Store feces prior to defecation

via Wikipedia infobox

Wikidata facts

Image: Rectum anatomy de 01.svg

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NCI Thesaurus ID: C12390
Commons category: Rectum

Sources (6)

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~11 min read

Article

19 sections

Contents

Structure
Blood supply and drainage
Microanatomy
Function
Clinical significance
Examination
Route of administration
Constipation
Inflammation
Cancer
Other diseases
Society and culture
Sexual stimulation
History
Etymology
See also
References
Sources
External links

The rectum (: rectums or recta) is the final straight portion of the large intestine in humans and some other mammals, and the gut in others. Before expulsion through the anus or cloaca, the rectum stores the feces temporarily. The adult human rectum is about long, and begins at the rectosigmoid junction (the end of the sigmoid colon) at the level of the third sacral vertebra or the sacral promontory depending upon what definition is used. Its diameter is similar to that of the sigmoid colon at its commencement, but it is dilated near its termination, forming the rectal ampulla. It terminates at the level of the anorectal ring (the level of the puborectalis sling) or the dentate line, again depending upon which definition is used. In humans, the rectum is followed by the anal canal, which is about long, before the gastrointestinal tract terminates at the anal verge. The word rectum comes from the Latin rēctum intestīnum, meaning straight intestine.

== Structure ==