Which is the correct sequence of air passage during inhalation?
(A) Nostrils → larynx → pharynx → trachea → lungs
(B) Nasal passage → trachea → pharynx → larynx → alveoli
(C) larynx → nostrils → pharynx → lungs
(D) Nostrils → pharynx → larynx → trachea → alveoli
Answer
The passage of air through the human respiratory system starts from the nostrils.
- The air then moves through the pharynx and larynx to reach the trachea .
- The trachea divides into 2 smaller branches, inside the lungs , called the bronchi which further divide into smaller branches called bronchioles .
- Each bronchi at its end has several balloon like structures called alveoli that facilitate in the exchange of gases between the blood and air in the lungs.
(d) Nostrils → pharynx → larynx → trachea → alveoli
