External nostrils → vestibules → nasal chambers → internal nares → naso pharynx → X → larynx → trachea. What is X?(a) Glottis(b) Alveoli(c) Atria(d) BronchiThe question was posed to me in semester exam.The above asked question is from Human Respiratory System in portion Breathing and Exchange of Gases of Biology – Class 11

External nostrils → vestibules → nasal chambers → internal nares

1.	External nostrils → vestibules → nasal chambers → internal nares → naso pharynx → X → larynx → trachea. What is X?(a) Glottis(b) Alveoli(c) Atria(d) BronchiThe question was posed to me in semester exam.The above asked question is from Human Respiratory System in portion Breathing and Exchange of Gases of Biology – Class 11
Answer» RIGHT choice is (a) Glottis Easiest explanation: Glottis is a part of respiratory passage and it OPENS into larynx. Near the glottis is a flap like STRUCTURE called epiglottis. At the time of SWALLOWING of food this flap covers the glottis to prevent the entry of food PARTICLES into it.

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