The diaphragm
A)is the chief muscle of inhalation.
B)is innervated by the phrenic nerve.
C)increases thoracic volume when contracted.
D)All of the above are true.

Question

Quizplus · Accepted Answer

All of the statements (A, B, and C) are true regarding the diaphragm. It is the primary muscle responsible for inhalation, is innervated by the phrenic nerve, and when it contracts it increases the volume of the thoracic cavity, which allows for air to enter the lungs.

The Diaphragm