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Anus

Key Stage 2

Meaning

The anus is part of the digestive system that poo comes out of.

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

A computer generated image showing the small intestine, large intestine, rectum and anus.

The anus is a ring of muscle at the end of the digestive system that holds tight until faeces is ready to be released.

About The Anus

The anus is found at the end of the rectum.
When the muscles of the anus relax then faeces can be released.
When the muscles 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 that holds tight until faeces is ready to be egested.

About The Anus

The anus is found at the end of the rectum.
When the muscles of the anus relax then faeces can be egested.
When the muscles of the anus contract it holds the faeces in.

References

AQA

Anus, page 100, GCSE Biology; Student Book, Collins, AQA'
Anus, page 46, GCSE Combined Science Trilogy 1, Hodder, AQA'