Q. Correct sequence of the air passage in humans is
A) Nose $\rightarrow$ Larynx $\rightarrow$ Pharynx $\rightarrow$ Bronchioles $\rightarrow$ Alveoli
B) Nose $\rightarrow$ Pharynx $\rightarrow$ Larynx $\rightarrow$ Bronchioles $\rightarrow$ Bronchi
C) Nose $\rightarrow$ Pharynx $\rightarrow$ Larynx $\rightarrow$ Bronchioles $\rightarrow$ Trachea
D) External nostril $\rightarrow$ Nasal passage $\rightarrow$ Internal nostril $\rightarrow$ Pharynx $\rightarrow$ Larynx $\rightarrow$ Trachea $\rightarrow$ Bronchi Bronchiole $\rightarrow$ Alveoli
Explanation
Pair of external nostrils opens above the upper lips, which leads to nasal passage. It opens into the nasopharynx. Nasopharynx opens through the glottis of the larynx region into the trachea. Trachea is a straight tube extending upto mid-thoracic cavity, which divides at the right and left bronchi. Each bronchi undergoes repeated division to form secondary and tertiary bronchi and bronchioles ending up in very thin terminal bronchioles, which gives rise to a number of very thin, irregular walled, vascularized bag like structure called alveoli [image:17_image20.png]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.