Transcription of Respiratory Systems: Ventilation & Gas Exchange
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Respiratory Systems: Ventilation & Gas Exchange
Respiratory Systems: Ventilation & Gas Exchange Ventilation of Respiratory Surfaces Non-directional Ventilation : Medium flows past gas Exchange surface in an unpredictable pattern. Tidal Ventilation External medium moves in and out of Respiratory system in a back and forth movement. Unidirectional Ventilation : Respiratory medium flows in at one point, and exits via another. Perfusion of Respiratory Surfaces The circulatory system allows oxygen from the Respiratory surface to be transported long distances by bulk flow. The movement of blood through the Respiratory surface can effect the efficiency of gas Exchange . Ventilation & Perfusion of Respiratory Surfaces Non Directional Ventilation : (1) skin breathers (2) tidal ventilators Unidirectional Ventilators (1) Concurrent (2) Countercurrent (3) Crosscurrent Non-Directional Ventilation Partial pressure of oxygen (PO2) in the blood leaving the gas exchanger can approach the PO2 in the medium.
Perfusion of Respiratory Surfaces The circulatory system allows oxygen from the respiratory surface to be transported long distances by bulk flow. The movement of blood …
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