Why gas exchange becomes a problem
Why gas exchange becomes a problem
Gas exchange is the diffusion of oxygen into an organism and carbon dioxide out of it. Diffusion is only fast enough over short distances, so larger bodies cannot rely on the outer surface alone.
Step-by-step lessons covering Eduqas A Level Biology Adaptations for gas exchange for A Level Biology. Each lesson works through exam-style questions in Component 1, Component 2 and Component 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.