what is difference between upper and lower respiratory tract
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The upper respiratory tract includes the nose and nasal passages, paranasal sinuses, the pharynx and the portion of the larynx above the vocal folds.
The lower respiratory tract includes the portion of the larynx below the vocal folds trachea, bronchi and bronchioles.
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Lower respiratory tract infections differ from upper respiratory tract infections by the area of the respiratory tract they affect. While lower respiratory tract infections involve the airways below the larynx, upper respiratory tract infections occur in the structures in the larynx or abo
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