Biology › Exchange surfaces and gas exchange

Exchange surfaces and gas exchange

Canonical unit B07

• Why nothing large can breathe through its skin
  Surface area to volume ratio and how it falls as an organism gets larger, the effect of shape as well as size, Fick's la…
• Lungs: seventy square metres, folded into a chest
  The route from trachea to alveolus and the cartilage, ciliated epithelium, goblet cells, smooth muscle and elastic fibre…
• Three other answers: tracheae, gills and stomata
  The insect tracheal system from spiracle to tracheole and how tracheal fluid moves during activity, the structure of a b…

Practical work that lands here

• Dissection and biological drawing