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Stomach

Key Stage 1

Meaning

The stomach is a part of the body where our food goes when we eat it.

Key Stage 2

Meaning

The stomach is a part of the digestive system and digest our food.

Key Stage 3

Meaning

A computer image of the stomach.

The stomach is an organ in the digestive system which breaks down food molecules into small molecules using enzymes.

Adaptations of the Stomach

The stomach produces Hydrochloric Acid.
The Hydrochloric Acid in the stomach kills bacteria to help prevent us getting sick.
The stomach digests food using enzymes.
The enzymes in the stomach work best in acid.
The stomach has a layer of mucus covering it to prevent digestive juices from damaging the lining of the stomach.

Key Stage 4

Meaning

The stomach is an organ in the digestive system which breaks down food molecules into small molecules using enzymes.

About the Stomach

The stomach produces Hydrochloric Acid.
The stomach digests food using digestive enzymes including a protease called pepsin which breaks down proteins into amino acids.
The Hydrochloric Acid in the stomach kills bacteria to help prevent infection and keeps the stomach acidic to be the optimum pH for the Digestive Enzymes to work.
The protease pepsin is an enzyme found in the stomach which has an optimum pH of 1.6.

References

AQA

Stomach, page 31, GCSE Biology; The Revision Guide, CGP, AQA
Stomach, pages 100, 103, 148, GCSE Biology; Student Book, Collins, AQA
Stomach, pages 37-39, 48, GCSE Biology; Third Edition, Oxford University Press, AQA
Stomach, pages 44, 47, GCSE Combined Science Trilogy 1, Hodder, AQA
Stomach; acid production, page 85, GCSE Combined Science Trilogy 1, Hodder, AQA