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CAIE A-Level Biology 9.1.3 Gas Exchange Image Recognition

Practise recognising trachea, bronchi, bronchioles, alveoli and blood vessels in images from cartilage, epithelium, muscle, lumen size and thin-walled air spaces.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • identify trachea or bronchus from cartilage, ciliated epithelium and goblet cells
  • identify bronchioles from absent cartilage, fewer goblet cells and smooth muscle
  • identify alveolar tissue from many thin-walled air spaces adjacent to capillaries

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