Q. 155.0( 1 Vote )

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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