In the heart, the halfmoon-shaped __________ __________ valve controls blood entering the arterial system from its location between the left ventricle and the aorta

________ employs materials that do NOT contribute to the development or spread of fire

A) Frame construction B) Noncombustible/limited combustible construction C) Ordinary construction D) Heavy timber construction

Metabolic disorders can be diagnosed using calcium, potassium and alkaline, phosphorus ______ studies.

a. water b. blood c. osteoclasts d. osteoblasts e. none of the above