Question

a bullet enters the left lung and collapses it. which cavity has been entered? multiple choice pericardial mediastinal pleural cranial vertebral

Explanation:

The pleural cavity is the fluid-filled space surrounding each lung; entry into this space (e.g., via a bullet) disrupts pressure and causes lung collapse. The pericardial cavity surrounds the heart, mediastinal cavity holds thoracic organs except lungs, cranial cavity holds the brain, and vertebral cavity holds the spinal cord, none of which are directly associated with the lung itself in this context.

Answer:

Pleural