IGCSEScienceCambridge (CIE)Co-ordinated Sciences (Double Award)BiologyRevision Notes7. Human NutritionHuman Diet & DigestionChemical Digestion

Chemical Digestion (Cambridge (CIE) IGCSE Co-ordinated Sciences (Double Award): Biology): Revision Note

Exam code: 0654 & 0973

Written by: Emma Archbold

Reviewed by: Lára Marie McIvor

Updated on 2 July 2026

Chemical Digestion

Food taken into the body goes through 5 different stages during its passage through the alimentary canal
- One of these is chemical digestion
Chemical digestion is the breakdown of large, insoluble molecules into small, soluble molecules
The role of chemical digestion is to produce small soluble molecules that can be absorbed

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Author: Emma Archbold

Expertise: Biology Content Creator

Prior to working at SME, Emma was a Biology teacher for 5 years. During those years she taught three different GCSE exam boards and two A-Level exam boards, gaining a wide range of teaching expertise in the subject. Emma particularly enjoys learning about ecology and conservation. Emma is passionate about making her students achieve the highest possible grades in their exams by creating amazing revision resources!

Reviewer: Lára Marie McIvor

Expertise: Content Creator

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.