Five main systems of the body include; Nervous system, Circulatory system, Respiratory system, Digestive system and Excretory system.However another very important system; the â¦ Sensory system is present but is not among the list of first five important ones or you may call it the sixth important system.
As of 2010-2014, the total population of Clear Spring is  423, which is 7.03% less than it was in 2000. The population growth rate is much lower than the state average rate of 11.16% and is much lower than the national average rate of 11.61%.
Clearfield County, Pennsylvania. Clearfield County is a sixth-class county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 81,642. The county seat is Clearfield, and the largest city is DuBois. The county was created in 1804 and later organized in 1822. Clearfield County comprises the DuBois, PA Micropolitan Statistical Area, which is also included in the State College-DuBois, PA Combined Statistical Area.