Breathing And Exchange Of Gases Animal Respiration Question 16

Question: The given diagram represents the human respiratory system with few structures labelled as 1, 2, 3 and 4.
  The exchange of gases takes place in which labelled structure?

Options:

A) 1: Trachea

B) 2: Bronchi

C) 3: Bronchioles

D) 4: Alveoli

Show Answer

Answer:

Correct Answer: D

Solution:

[d] In the diagram, label 1, 2, 3 and 4 represents trachea, bronchi, bronchioles and alveoli respectively.

Alveoli are sac like structure present in lungs.

They are the site of exchange of gases.