Curriculum Portal

infoWhy this? Comparing gas exchange systems reveals how surface area, diffusion distance, and concentration gradients enable organisms to meet their metabolic demands. It also explains adaptations for oxygen and carbon dioxide exchange and the balance between efficient exchange and water conservation.

scheduleWhy now? Earlier work on membrane transport and intestinal absorption establishes the principles of diffusion and specialised exchange surfaces. We now apply these to gas exchange before studying how mass transport connects exchange surfaces with tissues and how photosynthesis and respiration use the exchanged gases.