Biology 9700 · AS & A Level · The microscope in cell studies

The microscope in cell studies — practice question

The photomicrograph shows a transverse section of part of the gas exchange system of a mammal. What does the line labelled V indicate?

  • Athe diameter of an alveolus
  • Bthe diameter of a bronchiole
  • Cthe diameter of a capillary
  • Dthe diameter of a trachea

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