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.
Nigeria, with 11 million Internet users, has the largest online population. Of the sub-Saharan African countries discussed in this profile, Zimbabwe (the one non-island nation to break the 10 percent threshold) has the highest penetration rate at 10.5 percent, followed by Uganda (7.8 percent) and Nigeria (7.26 percent).ote: a previous version of this profile is available at Sub-Saharan Africa, 2006-2007. The OpenNet Initiative also presents individual reports for the following countries in the region: Ethiopia Nigeria Uganda Zimbabwe.