____ is the concentration of a gas when compared to air.

The nasopharyngeal airway is MOST beneficial because it:

A. can effectively stabilize fractured nasal bones if it is inserted properly. B. is generally well tolerated in conscious patients with an intact gag reflex. C. effectively maintains the airway of a patient in cardiopulmonary arrest. D. can maintain a patent airway in a semiconscious patient with a gag reflex.

The area between the anus and external genitalia:

A) penile. B) perirenal. C) pericardium. D) perineum.