Which of the following terms means "arranged in layers"?

Ratio and ____________________ is the oldest method used for calculating dosage

Fill in the blank(s) with correct word

Positive pressure ventilation uses external pressure to:

A. force air into the patient's lungs. B. shift the patient's position so breathing is not obstructed. C. open the airway of a patient with an airway obstruction. D. open the airway of a patient with no suspected neck or spine injury.