Gas Exchange Systems

  • Explain adaptations in various gas exchange systems: in single-celled organisms, insects’ tracheal systems, fish gills, and dicotyledonous plants’ leaves
  • Single-celled organisms exchange gas across their body surface
  • Insects’ tracheal system comprises tracheae, tracheoles, and spiracles
  • Fish exchange gas across gills consisting of gill lamellae and filaments; counter-current principle is involved
  • Dicotyledonous plants use leaves for gas exchange, specifically through mesophyll and stomata
  • This knowledge can be applied to any system
  • You will receive needed information to apply your knowledge to new concepts
  • It’s advised to draw and label diagrams of these structures for revision.