Males account for ________ percent of all eating disorders

Knowing types of doors and door hardware can help firefighters:

A. judge roof safety. B. predict fire development. C. select correct forcible entry tools. D. select the right type of vertical tactical ventilation.

The long, muscular tubes that carry urine from the kidneys to the urinary bladder using rhythmic muscular contractions are called _______________. 

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