Most of the work of breathing is done by the

Question

Quizplus · Accepted Answer

The main muscle of inhalation is the diaphragm.It is connected to the sternum,ribs,and vertebrae.During normal,quiet breathing,the diaphragm does approximately 80% of the work of breathing.The most important of these are the external intercostal muscles,which elevate the ribs and expand the chest cage outward.The scalene,anterior serratus,and sternocleidomastoid muscles also participate to elevate the first two ribs and sternum.

Most of the Work of Breathing Is Done by the