During inspiration the main current of air flow in a normal nasal cavity is through:: (A) Middle part of the cavity in a parabolic curve, (B) Lower part of the cavity in a parabolic curve, (C) Superior part of the cavity in a parabolic curve, (D) Through olfactory area
Answer is A. (a) Middle part of the cavity in a parabolic curve(Ref. Cummings, 6th ed., 626)The main current of airflow passes through the middle part of the nose in a parabolic curve both during inspiration and expiration.