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.
Census: Computer ownership, internet connection varies widely across U.S. Nearly 25 years after the birth of the world wide web, most Americans have computers and internet access, but the nation remains a patchwork of connectivity, with some metro areas full of high-speed connections and other areas much less plugged in.