1.

Which is the correct sequence of air passage during inhalation? A. Nostrils → larynx → pharynx → trachea → lungs B. Nasal passage → trachea → pharynx → larynx → alveoli C. larynx → nostrils → pharynx → lungs D. nostrils → pharynx → larynx → trachea → alveoli

Answer»

The inhaled air travels from nostril to pharynx. From pharynx it enters into larynx. The epiglottis acts as a lid due to which air enters the trachea and not into the alimentary canal. The trachea thus provides a clear airway for air to enter into 2 large tubes called bronchi which leads to one of the lungs. The bronchi divide into bronchioles which further divide into alveoli. Gas exchange takes place here in alveoli.



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