Diffusion and gas exchange surfaces
Diffusion and gas exchange surfaces
A gas exchange surface is a boundary across which oxygen and carbon dioxide diffuse between an organism and its environment. Gas exchange moves oxygen into an organism and carbon dioxide out, mainly by diffusion.
Step-by-step lessons on AQA A Level Biology Gas exchange, covering Gas exchange. Each one builds up to exam-style questions. 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.