In order to keep the trachea open in any position, the trachea is made of O-shaped cartilage stacked one on top of the other

A nasal cannula will deliver --- % of oxygen at a flow rate of 6 LPM in optimal conditions.

(A) 30 (B) 40 (C) 50 (D) 65

Calculators have been used in the medical environment since which decade?

A. 1950s B. 1960s C. 1970s D. 1980s