Nerves and Muscle Control. Muscular System: Muscles are controlled by the peripheral nervous system (PNS), an extension of the central nervous system. The central nervous system (CNS) includes the brain and spinal column. The PNS extends from the CNS, connecting the CNS to the limbs, organs, and other parts of the body. The PNS is divided into the somatic nervous system (SNS) and the autonomic nervous system (ANS). Skeletal muscles are controlled by the SNS, while cardiac and smooth muscles are controlled by the ANS. Read on to learn more about the peripheral nervous system, and its role in controlling the muscular system.
2015 Black Population: 46.3 million, 14.4% of USA. In 2015 US Census Bureau estimated 46,282,080 African Americans in the United States meaning that 14.3% of the total American population of 321.4 Million is Black. This includes those who identify as âBlack Onlyâ and as âBlack in combination with another raceâ.
With 25 percent of its African-American residents jobless, Chicago has the highest black unemployment rate among the nationâs five most populous cities. Chicagoâs rate is higher than Philadelphiaâs 19 percent, Los Angelesâ 18 percent, Houstonâs 15 percent and New York Cityâs 14 percent, based on 2013 U.S. Census figures.