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.
Computer ownership is now at about 4-5% of the worlds population; however, with many social projects putting computers in villages in developing countries between 12-14% of th â¦ e worlds population have access to a computer. Approx 3-5 % of the world's population have internet access.