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WAEC Biology 2023 Question 15

Question 15

Respiration

The diagram below is an illustration of some structures used for gaseous exchange in humans. The parts labeled I, II, III and IV respectively are

Diagram for this question
  1. A.larynx, bronchus, bronchiole and trachea.
  2. B.bronchus, bronchiole, trachea and larynx.
  3. C.bronchiole, trachea, bronchus and larynx.
  4. D.larynx, trachea, bronchiole and bronchus.
Show the answer and explanation

Answer: D (larynx, trachea, bronchiole and bronchus.)

Explanation

I is the larynx at the top, II the trachea with its rings of cartilage, III the small branches (bronchioles) inside the lung, and IV the main bronchus entering the lung.