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2.2.1 The human digestive system
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Why digestion is necessary

Why digestion is necessary

Digestion is the breakdown of large, insoluble food molecules into small, soluble molecules. Large molecules such as starch, proteins and lipids are too large to pass through the gut wall.

2.2.1 The human digestive system Lesson

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

Step-by-step lessons on AQA GCSE Biology 2.2.1 The human digestive system. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

Lessons