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2.2.1 The human digestive system
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The purpose of digestion

The purpose of digestion

Digestion is the breakdown of large, insoluble food molecules into small, soluble molecules that can be absorbed through the gut wall. Starch, proteins and fats are too large to pass through the gut wall before digestion.

2.2.1 The human digestive system Lesson

  1. GCSE
  2. /Biology
  3. /2.2.1 The human digestive system

Step-by-step lessons covering AQA GCSE Biology 2.2.1 The human digestive system for Foundation and Higher tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Start with the foundational topics and build up to the higher-tier material.