During insipiration the main current of airflow in a normal nasal cavity is through
* During quite respiration inspiratory air current pass through middle pa of the nose between the turbinatcs and nasal septum. * Very little air passes through inferior meatus or olfactory region of the nose. * Therefore weak odorous substances have to be sniffed before they reach olfactory area. * During expiration air current follows the same course as during inspiration but the entire air current is not expelled directly through the nares. * Friction offered at lumen nasi conves it into eddies under cover of inferior and middle turbinates and this ventilates the sinuses through the Ostia
Middle pa of the cavity in middle meatus in a parabolic curve
Lower pa of the cavity in the inferior meatus in a parabolic curve
Superior pa of the cavity in the superior meatus
Through olfactory area