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.
For many Americans, going online is an important way to connect with friends and family, shop, get news and search for information. Yet today, 13% of U.S. adults do not use the internet, according to a new Pew Research Center analysis of survey data. The size of this group has changed little over the past three years, despite recent government and social service programs to encourage internet adoption.