NEET Biology Breathing And Exchange Of Gases Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

Question & Answer Discuss:

The given figure shows the respiratory system. Identify the correct structure marked as 1, 2, 3 and 4 whose contraction initiated the inspiration which in turn increases the volume of thoracic chamber in the anteroposterior axis. 1 2 4 heart 3

(a) 2-Diaphram

(b) 1-lung

(c) 3-pleural

(d) 4-Alveoli