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Why diffusion is not enough

Why diffusion is not enough

Large multicellular animals cannot rely on diffusion alone because many cells are far from the outside environment. Their surface area to volume ratio is smaller, so diffusion distances are long and exchange would be too slow.

Mass transport in animals Lesson

  1. A Level
  2. /Biology
  3. /Mass transport in animals

Step-by-step lessons covering AQA A Level Biology Mass transport in animals for A Level Biology. Each lesson works through exam-style questions in Paper 1, Paper 2 and Paper 3 format. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.

Lessons