How much or what percentage of the body's weight is
made up by the muscular system?

Your answer is d. recognition! hope this

What are the following? i would expect him to get check-ups often.

This is first hand knowledge, top-level athletes, successful business people and achievers in all fields all  set goals. setting  goals  gives you long-term vision and short-term motivation . it focuses your acquisition of knowledge, and you to organize your time and your resources so that you can make the very most of your life.

Asmall appetite is not a typical cause of anorexia nervosa. what is typical is low self esteem, a desire to others and lack of mood regulating chemicals.