Q.
Study the given figure of respiratory passage carefully and identify the parts labelled as $A$, $B$, $C$, $D$ and $E$.
$\,\,\,$
A$\,\,\,$
B
C$\,\,\,$
D$\,\,\,$
E$\,\,\,$
(a)$\,\,\,$
Alveolar$\,\,\,$
Secondary bronchus$\,\,\,$
Alveoli$\,\,\,$
Bronchioles$\,\,\,\,\,$
Trachea$\,\,\,$
(b)
Alveoli$\,\,\,$
Secondary bronchus$\,\,\,$
Alveolar sac$\,\,\,$
Trachea$\,\,\,$
Bronchioles$\,\,\,$
(c)
Alveolar sac$\,\,\,$
Tertiary bronchus$\,\,\,$
Alveoli$\,\,\,$
Trachea$\,\,\,$
Bronchioles$\,\,\,$
(d)
Alveoli$\,\,\,$
Tertiary bronchus$\,\,\,$
Alveolar sac$\,\,\,$
Bronchioles$\,\,\,$
Trachea$\,\,\,$
| $\,\,\,$ | A$\,\,\,$ | B | C$\,\,\,$ | D$\,\,\,$ | E$\,\,\,$ |
|---|---|---|---|---|---|
| (a)$\,\,\,$ | Alveolar$\,\,\,$ | Secondary bronchus$\,\,\,$ | Alveoli$\,\,\,$ | Bronchioles$\,\,\,\,\,$ | Trachea$\,\,\,$ |
| (b) | Alveoli$\,\,\,$ | Secondary bronchus$\,\,\,$ | Alveolar sac$\,\,\,$ | Trachea$\,\,\,$ | Bronchioles$\,\,\,$ |
| (c) | Alveolar sac$\,\,\,$ | Tertiary bronchus$\,\,\,$ | Alveoli$\,\,\,$ | Trachea$\,\,\,$ | Bronchioles$\,\,\,$ |
| (d) | Alveoli$\,\,\,$ | Tertiary bronchus$\,\,\,$ | Alveolar sac$\,\,\,$ | Bronchioles$\,\,\,$ | Trachea$\,\,\,$ |
Breathing and Exchange of Gases
Solution: