What is the Main Muscle Responsible for Pulmonary Ventilation

Question

What is the main muscle responsible for pulmonary ventilation?
A) Internal intercostal muscles
B) External intercostal muscles
C) Scalenes
D) Diaphragm

Accepted Answer

The main muscle responsible for pulmonary ventilation is the diaphragm, which contracts and relaxes during inhalation and exhalation respectively.