Gaseous exchange system

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  • Created by: elle1999
  • Created on: 02-02-16 16:36
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  • Gaseous exchange system
    • Trachea
      • Carries air from nose to chest
      • Cartilage
        • Food can move easily
      • Ciliated epithelial cell and goblet cells
    • Bronchus
      • Two for left and right lung
      • Similar to trachea but smaller
    • Bronchioles
      • No cartilage
      • Smooth muscle
      • Epithelium
    • Alveoli
      • Air sacs
      • 200-300um
      • Epithelium
      • Some cartilage
      • Collagen
      • Elastic fibres
    • Adaptations of alveoli
      • Large surface area
      • Thin layers
      • Good blood supply
      • Good ventilation
        • Maintains gradient
    • Lung surfactant
      • Allows alveoli to remain inflated

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