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 fact, the World Wide Web as we know it represents just 4% of networked web pages â the remaining 96% of pages make up what many refer to as the âInvisible Internet,â âInvisible Webâ or âDeep Web.â This massive subsection of the Internet is 500 times bigger than the visible Web and is not indexed by search engines like Google.