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.
More than 80 percent of people who aren't connected to the Internet are younger than 55 years old, and more than 42 percent of younger than 25 years old. That includes children, some of whom can't hold a mouse, let alone manage a modem.