First - Nose the organ through which the air enters and is filtered, Second - Nasal passages channel for airflow through the nose in which the air is warmed, cleaned, and moistened., Third - Trachea also called windpipe; a hollow tube that serves as passageway of air into the lungs, 4th - Bronchi also called bronchial tubes; two branching tubes that connect the trachea to the lungs, 5th - Bronchioles -the finer subdivisions of the bronchi; hairlike tubes that connect to the alveoli, 6th - Alveoli also called airsacs; allow the gas exchange in lungs,

Breathing System

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