The Respiratory Syste1

The Respiratory Syste1 - The Respiratory System Changing...

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The Respiratory System Changing Alveolar Volume Increasing thoracic volume results in decreased pleural pressure, increased alveolar volume, decreased alveolar pressure, and air movement into the lungs. Decreasing thoracic volume results in increased pleural pressure, decreased alveolar volume, increased alveolar pressure, and air movement out of the lungs. Pulmonary Volumes and Capacities There are four pulmonary volumes: tidal volume, inspiratory reserve, expiratory reserve, and residual volume. Pulmonary capacities are the sum of two or more pulmonary volumes and include vital capacity and total lung capacity. The forced expiratory vital capacity measures the rate at which air can be expelled from the lungs. Gas Exchange The respiratory membranes are thin and have a large surface area that facilitates gas exchange. The components of the respiratory membrane include a film of water, the walls of the alveolus and the capillary, and an interstitial space. Respiratory Membrane Thickness
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