How to become a topper? :')

Answer in a couple of paragraphs, 1 or 2 at the most if anything! 20 points + brainliest--> explain what all the systems in your body do to work together < --list of systems needed: circulatory systemrespiratory systemdigestive systemexcretory systemnervous system

Mechanical sissy washers are required to have

What is the most likely reason the professional group binds its members to follow these rules?