Narrowest part in infant's respiratory tract is:: (A) Subglottis, (B) Glottis, (C) Carina, (D) None of these
Answer is A. (a) Subglottis(Ref. Scott Brown, 8th ed., Voll; 326)In infant's larynx the diameter of cricoid cartilage is smaller than the glottis, making subglottis the narrowest part, whereas in adults the narrowest part is the glottis.