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.
In all, one-in-five American adults (19%) indicate that at least one of those conditions apply to them, and 7% of the public says that both of these conditions apply â that is, they do not have broadband access at home, and also have relatively few options for getting online other than their cell phone.