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Chapter 36: The Humsn Breathing System

  1. What are alveoli? (4p)
    • Alveoli are tiny air sacs at the end of the bronchioles where gas exchange occurs.
    • Walls of alveoli are only 1 cell think to maximise diffusion.
    • Each alveolus has rich blood supply as many capillaries surround each.
    • There are around 700 million alveoli.
  2. What are the tiny air sacs at the end of bronchioles called?
    Alveoli are tiny air sacs at the end of bronchioles where gas exchange occurs.
  3. What occurs at the alveoli?
    Gas exchange occurs
  4. How thick are the walls of the alveoli?
    Walls of the alveoli are only 1 cell thick to maximise diffusion.
  5. Why are the walls of the alveoli only 1 cell thick?
    Walls of the alveoli are only 1 cell thick to maximise diffusion.
  6. What kind of blood supply does alveoli have?
    Each alveolus has a rich blood supply as many capillaries surround each.
  7. How do alveoli have a rich blood supply?
    Each alveolus has a rich blood supply as many capillaries surround each.
  8. His many alveoli are there?
    There are around 700 million alveoli
  9. What are 6 essential features of alveoli and capillaries?
    • 1. Alveoli are numerous
    • 2. Alveoli have rich blood supply
    • 3. Alveoli have walls only 1 cell thick
    • 4. Alveoli surface is moist.
    • 5. Alveoli walls are elastic
    • 6. Capillaries that surround each alveolus are only 1 cell thick.
  10. Are there many or few alveoli?
    Alveoli are numerous
  11. What is the surface of alveoli like?
    Alveoli surface is moist.
  12. What are alveoli walls like ?
    Alveoli walls are elastic.
  13. How thick are the capillaries that surround each alveolus?
    Capillaries that surround each alveolus are only 1 cell thick.
Author
jacquelineglynn
ID
361859
Card Set
Chapter 36: The Humsn Breathing System
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