They are primarily responsible for maintaining and changing posture, locomotion, as well as movement of internal organs, such as the contraction of the heart and the movement of food through the digestive system via peristalsis.
Internet Users in the U.S.A. (2016*) 1  Share of U.S. Population: 88.5 % (penetration) 2  Total Population : 324,118,787. 3  Share of World Internet Users: 8.4 4  %. Internet Users in the World: 3,424,971,237.
That year, nearly half (48%) of American adults did not use the internet. (The 2015 figure of 15% is not statistically different from the current figure.) A 2013 survey from the Center found some key reasons that some people do not use the internet.