Breathing and Exchange of Gases Question 13
13. Air is breathed through
[1994]
(a) Trachea $-$ lungs $-$ larynx $-$ pharynx $-$ alveoli
(b) Nose $-$ larynx $-$ pharynx $-$ bronchus $-$ alveoli $-$ bronchioles
(c) Nostrils $-$ pharynx $-$ larynx $-$ trachea $-$ bronchi $-$ bronchioles $-$ alveoli
(d) Nose $-$ mouth $-$ lungs
Show Answer
Answer : c
Hints & Solution
(c) The pathway of inhaled air is - Nostrils $\rightarrow$ pharynx (common passage for food & air) $\rightarrow$ larynx (voice box) $\rightarrow$ trachea (the wind pipe) $\rightarrow$ bronchi ( 2 for each side lungs) $\rightarrow$ bronchioles (give rise to alveolar ducts) $\rightarrow$ alveoli (the exchange site for gases in the form of small sacs or pouches).
