Respiratory Physio-39

Respiratory Physio-39 - Chapter 39 Respiratory Physiology 1...

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Chapter 39 Respiratory Physiology 1
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Mechanisms of respiration ¢ Pulmonary ventilation l Inspiration l Expiration l Respiratory muscles Diaphragm External intercostal Others 2
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Mechanisms of respiration ¢ Steps of ventilation l Contraction of diaphragm and external intercostal muscles l Increase of thoracic volume l Expansion of the pleural cavities and lungs l Decrease of lung pressure below atmospheric pressure 3
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Mechanisms of respiration l Inspiration l Lung pressure becomes equal to atmospheric pressure l Air stops to flow inside l Relaxation of respiratory muscles l Recoiling of the lung tissue 4
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Mechanisms of respiration l Decrease of intrathoracic and intrapulmonary volumes l Increase of pulmonary pressure l Expiration 5
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Mechanisms of respiration ¢ Pneumothorax it is the entry of air into the pleural cavity l It breaks the fluid bond between the visceral and parietal pleura l It will cause the lung to collapse – atelectasis 6
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Respiratory volumes and capacities ¢
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Respiratory Physio-39 - Chapter 39 Respiratory Physiology 1...

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