The anus (frae Laitin anus, meanin 'ring, anus', which is frae Proto-Indo-European *h₁eh₂no-, meanin "ring", "circle")[1][2] is an openin at the opposite end o an ainimal's digestive tract frae the mooth. Its function is tae control the expulsion o faeces, unwantit semi-solit matter produced during digestion. The human anus is the freemit openin o the rectum. Twa sphincters control the exit o faeces frae the bouk during an act o defecation, which is the primar function o the anus.

Anus
Protovsdeuterostomes.svg
Formation o anus in proto- an deuterostomes
Details
PrecursorProctodeum
SystemAlimentary, sometimes reproductive
ArteryInferior rectal artery
VeinInferior rectal vein
NerveInferior rectal nerves
LymphSuperficial inguinal lymph nodes
Identifiers
LaitinAnus
TAA05.7.05.013
FMA15711
Anatomical terminology
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Anus
Female and male anus.jpg
The anus o a female (left, wi prominent perineal raphe) an a male (richt).
Identifiers
TAA05.7.05.013
FMA15711
Anatomical terminology
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ReferencesEedit

  1. Martim de Albuquerque (1873). Notes and Queries. Original from the University of Michigan: Oxford University Press. p. 119.
  2. Edward O'Reilly, John O'Donovan (1864). An Irish-English Dictionary. Original from Oxford University: J. Duffy. p. 7.