Respiration & Gas Exchange

  1. Two steps in gas exchange 
    • Passage of 02/C02 through a respiratory membrane
    • Transport of 02/C02 between circulatory system & the cells of the body
  2. Cutaneous Respiration
    integument serves as respiratory membrane
  3. What types of animals use cutaneous respiration?
    small/slow animals
  4. 3 animals that rely exclusively  on cutaneous respiration
    • Sponges
    • Hydras
    • Flatworms
  5. How much more oxygen does air have than water?
    20x's more
  6. How much faster do gas molecules diffuse in air than in water?
    10,000x's faster
  7. Gills
    Allow for gas exchange in water
  8. External Gills
    increase the amount of water that goes through them to get more oxygen
  9. What type of ventilation do fish with internal gills use?
    Ram ventilation
  10. What type of fishes use ram ventilation?
    Active fish (sharks)
  11. Fish that don't use ram ventilation must ventilate gills by doing what?
    Active Pumping
  12. Process of Ram Ventilation
    • Fish keep their mouths open while swimming
    • Forward motion forces water in & through the buccal over the gills
  13. What terrestrial animals have gills?
    • Pill Bugs
    • Land Crabs
    • Animals in moist environments
  14. In what animals is the tracheal system found? (3)
    Insects, spiders, centipedes
  15. What is the tracheal system?
    Extensive network of hallow thin walled tubes (trachea) that branch into every part of the body
  16. Tracheole
    Branch into a fine network over the cells
  17. Where does the tracheal system deliver oxygen?
    Directly to the cells
  18. What kind of lungs do vertebrates have?
    Ventilation lungs
  19. Ventilation Lungs 
    Air is moved in & out by pumping
Card Set
Respiration & Gas Exchange
respiration & gas exchange of different animals