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Anus
,→Key Stage 4
===About the Anus===
: The muscles in the anus need to relax to let out the poo. You should not try to 'push' the poo out or it can cause [[piles]].
==Key Stage 3==
===Meaning===[[File:Anus.png|right|300px|thumb|A computer generated image showing the [[Small Intestine|small intestine]], [[Large Intestine|large intestine]], [[rectum ]] and [[anus]].]]
The [[anus]] is a ring of [[muscle]] at the end of the [[Digestive System|digestive system]] that holds tight until [[faeces]] is ready to be released.
: When the [[muscle]]s of the [[anus]] [[contract]] it holds the [[faeces]] in.
: If the [[faeces]] does not come out when you relax then you have [[constipation]] and need to eat more [[fibre]].
==Key Stage 4==
===Meaning===
The [[anus]] is a [[sphincter]] at the end of the [[Digestive System|digestive system]] that holds tight until [[faeces]] is ready to be [[Egestion|egested]].
===About The Anus===
: The [[anus]] is found at the end of the [[rectum]].
: When the [[muscle]]s of the [[anus]] relax then [[faeces]] can be [[Egestion|egested]].
: When the [[muscle]]s of the [[anus]] [[contract]] it holds the [[faeces]] in.
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/0008158754/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158754&linkCode=as2&tag=nrjc-21&linkId=27ad53b0283feeff7fc5ae04a9e205f47 ''Anus, page 100, GCSE Biology; Student Book, Collins, AQA']
:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Anus, page 46, GCSE Combined Science Trilogy 1, Hodder, AQA']