Which of the following is NOT true of the diaphragm?

A) It is considered to be the prime mover for inspiration.
B) When it contracts, it compresses the thorax and decreases its volume.
C) Its action is to flatten during inspiration.
D) It is innervated by the phrenic nerves.
E) All of these are true of the diaphragm.

Prime Mover

The muscle or group of muscles primarily responsible for generating a specific movement in the body.

Diaphragm

A dome-shaped muscular partition separating the thoracic cavity from the abdominal cavity, playing a crucial role in the breathing process.

Phrenic Nerves

Nerves that originate in the neck and pass down between the lung and heart to reach the diaphragm, crucial for breathing.