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Respiratory Physiology: Mechanics of Breathing and Lung Function <br>

Explore lectures on respiratory physiology, including diaphragm and intercostal muscle actions, pressure-volume curve, compliance, surface tension effects, and alveolar epithelial cells. Understand perfect lung function and regional differences in ventilation. Examine pneumothorax, fibrosis, and pressure-volume curve relaxation. <br>

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Respiratory Physiology: Mechanics of Breathing and Lung Function <br>

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  1. Mechanics of Breathing I Lectures on respiratory physiology

  2. Action of the diaphragm Perfect Lung

  3. Action of the intercostal muscles Perfect Lung

  4. Action of the abdominal muscles Perfect Lung

  5. Action of the intercostal muscles Perfect Lung

  6. Pressure-volume curve of the lung Perfect Lung

  7. Compliance of lung 3000 2000 COMPLIANCE = ΔV / ΔP =1000/5 = 200 ml/cmH2O 1000 ΔV FRC Volume above FRC (ml) ΔP 0 -10 -20 -30 Intrapleural pressure (cmH2O)

  8. Capillary showing collagen (Col) Perfect Lung

  9. Fibers of elastin Perfect Lung

  10. Some effects of surface tension Perfect Lung

  11. Comparison of air and saline inflation Perfect Lung

  12. Measurement of surface tension and its behavior Perfect Lung

  13. Comparison of air and saline inflation Perfect Lung

  14. Type II alveolar epithelial cell

  15. Type II cell showing lamellar inclusion bodies (LIB)

  16. Lung with absence of surfactant

  17. Regional differences of ventilation at FRC

  18. Regional differences of ventilation at RV

  19. Alveoli are larger at the apex (upper panel) than base (lower)

  20. Airway closure at the lung base

  21. Pressure changes with bilateral pneumothorax

  22. Pneumothorax of right lung

  23. Fibrosis of right lung

  24. Relaxation pressure-volume curves

  25. Pressure-volume curve of the lung Perfect Lung

  26. Relaxation pressure-volume curves

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