Which of the following is NOT a category of hazard for OR personnel or surgical patients?

The MOST critical treatment for a tension pneumothorax involves:

A. placing a bulky dressing over the affected side of the chest. B. assisting the patient's breathing with increased tidal volume. C. surgically removing the portion of the lung that is damaged. D. inserting a needle through the rib cage into the pleural space.

Two or more tissue types combine to form ________. 

Fill in the blank(s) with the appropriate word(s).