The main muscle of breathing is the:

Choose the word that best describes each sentence or group of words. ? ?The lab technician doesn't seem to care

A) ?fragmented B) ?complete C) ?run-on D) ?non-parallel

Laryngotracheal injury occurs infrequently in blunt trauma but is present in up to ____ of penetrating neck trauma.

A. 10% B. 20% C. 40% D. 50%