Question

which of the following is not a muscle primarily involved in the breathing pr
a) internal intercostal
b) diaphragm
c) external intercostal
d) latissimus dorsi

Explanation:

The diaphragm is the primary muscle of breathing. The external intercostals assist in inhalation by elevating the ribs, and the internal intercostals assist in forced exhalation. The latissimus dorsi is a large muscle of the back that is mainly involved in movements of the shoulder and arm, not primarily in breathing.

Answer:

D. latissimus dorsi