Anus

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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
Anatomical terminology
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
Anatomical terminology
Anatomy of the human anus. Frontal section.

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.

References[eedit | eedit soorce]

  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.