Airway resistance refers to the resistance to airflow in the respiratory passages, which can affect how easily air moves in and out of the lungs. It is a component of the total resistance within the respiratory system and is primarily determined by the diameter of the airways, the viscosity of the air, and the lung volume. Airway resistance can be influenced by several factors, including: 1. **Bronchial Diameter**: The wider the airways, the lower the resistance.
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