Conducting zones: anatomic

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Conducting zones anatomic deadspace
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Respiratory segment Maximize surface area of Air
Blood interface
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Pulmonary vs Bronchial Circulation
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Airway wall structure is Specialized for function
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Scanning E.M.
Light microscopy
Type I Type II epithelium
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• Type II epithelial cells contain
• Lamellar bodies
• Site of synthesis of surfactant

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Ps 2T / r
With air / water interface, wall tension is
largely surface tension
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• Alveoli are also kept open by support from
  surrounding alveolar structures.
• What happens when alveoli are destroyed, e.g.
  emphysema?

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Innervation of the diaphragm is voluntary motor
with central modulation Motor innervation of
airway smooth muscle and all sensory is autonomic.
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