The most important muscle associated with breathing is the
A)diaphragm.
B)external intercostal.
C)intertransversarii.
D)rotators.
E)quadratus lumborum.

Question

Quizplus · Accepted Answer

The diaphragm is the most important muscle for breathing as it contracts and flattens to increase the volume of the thoracic cavity during inhalation and relaxes to decrease the volume during exhalation. The external intercostal muscles are also involved in inhalation, but to a lesser extent. The other muscles listed are not primarily involved in the process of breathing.

The Most Important Muscle Associated with Breathing Is the