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.
Six in ten seniors now go online, and just under half are broadband adopters. In April 2012 the Pew Research Center found for the first time that more than half of older adults (defined as those ages 65 or older) were internet users.Today, 59% of seniors report they go onlineâa six-percentage point increase in the course of a yearâand 47% say they have a high-speed broadband connection at home.In addition, 77% of older adults have a cell phone, up from 69% in April 2012.nternet use and broadband adoption among seniors each fall off notably starting at approximately age 75. Some 68% of Americans in their early 70s go online, and 55% have broadband at home.