The inspiratory muscles include the
A) diaphragm and internal intercostal muscles
B) diaphragm and external intercostal muscles
C) diaphragm and abdominal muscles
D) internal and external intercostal muscles
E) none of these

Question

Quizplus · Accepted Answer

The inspiratory muscles are responsible for the inhalation of air and include the diaphragm and external intercostal muscles. The diaphragm is the main muscle of inspiration which contracts and flattens to create a vacuum, pulling air into the lungs. The external intercostal muscles assist with this process by elevating the ribs and expanding the chest cavity. The internal intercostal muscles and abdominal muscles are involved in forced exhalation.

The Inspiratory Muscles Include the