What are cylinders in a car? They are the hollowed out shapes/areas in the motor block, which the pistons move up and down through. The petrol is let into the cylinder, when piston pushes up, the petrol eâ¦xplodes and pushes the piston down. The bigger the cylinder the bigger to push, the more powerful the motor.
1 One in 200 American women suffers from anorexia. 2  Two to three in 100 American women suffers from bulimia. 3  Nearly half of all Americans personally know someone with an eating disorder (Note: One in five Americans suffers from mental illnesses.)  An estimated 10 â 15% of people with anorexia or bulimia are males.
Lifetime Prevalence. The reported lifetime prevalence of anorexia nervosa among women has ranged from 0.9% - 2.2% and 0.2 - 0.3% in men (Keski-R et al 2008). With regard to bulimia nervosa, estimates of lifetime prevalence among women range from 1.5% to 2% and 0.5% in men.Prevalence of eating disorders in young children is unknown.ating disorders have been reported in up to 4% of adolescents and young adults. The most common age at onset for anorexia nervosa is the mid teens; in 5% of the patients, the onset of the disorder is in the early twenties. The onset of bulimia nervosa is usually in adolescence but may be as late as early adulthood.