What are the main organs of the cns?

True or false mucous membranes destroy pathogens on the outer body surface, at body openings.

Why is it so important to have a lifetime commitment to training? a-it takes your entire life to become fit b-it keeps you from becoming bored c-you will lose strength and endurance once you stop exercising d-it increases your motivation in life

If you are having a hard time lifting something, you should arch your back. a. true b. false