Anus

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
Formation o anus in proto- an deuterostomes
Details
Precursor	Proctodeum
System	Alimentary, sometimes reproductive
Artery	Inferior rectal artery
Vein	Inferior rectal vein
Nerve	Inferior rectal nerves
Lymph	Superficial inguinal lymph nodes
Identifiers
Laitin	Anus
TA	A05.7.05.013
Anatomical terminology [eedit on Wikidata]

Anus
The anus o a female (left, wi prominent perineal raphe) an a male (richt).
Identifiers
TA	A05.7.05.013
Anatomical terminology [eedit on Wikidata]

Anatomy of the human anus. Frontal section.