Respiration. Outline. The Respiratory Tract ( includes ) The Nose The Pharynx The Larynx The trachea (windpipe) The Bronchial Tree The Lungs Gas Exchange Mechanisms of Breathing Inspiration and Expiration Respiration and Health. The Respiratory System.
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As air moves towards the lungs it is cleansed, warmed, and moistened.
As air moves out during expiration, it cools and deposits moisture on the lining of the trachea and the nose