Describe the Mechanics of Inhalation and Exhalation

Culver in Clinical Respiratory Medicine Fourth Edition 2012 Measurement by Nitrogen Washout. And at the level of the acinus the same ducts are used for both inhalation and exhalation.

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. This considerably extends the lifetime of the droplet from a fraction of a second to minutes. A significant amount of air generally remains in the lung at the end of exhalation. As we will describe in detail below.

This means that at the end of each half breathing cycle the airflow has to come to a stop and reverse. The locally moist and warm atmosphere within the turbulent air helps the droplets escape evaporation much longer. The reversing nature of the airflow and the appreciable amount of residual.

The subject breathes on a mouthpiece that at the end of a relaxed tidal exhalation is connected to an inspiratory. The nitrogen washout technique also is based on the principle of conservation of mass of an inert gasin this case the nitrogen normally resident within the lungs. Expulsion of air due to exhalation sneezing and coughing results in the release of multiphase turbulent flow which is generally composed of hot moist air.

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