Nervous System. All mental and physical activities are controlled or mediated by the brain and the nervous system. Voluntary actions originate in the brain and the nerves carry the information to other parts of our body.The nervous system relies upon a correct chemical balance in the body.ervous System. All mental and physical activities are controlled or mediated by the brain and the nervous system. Voluntary actions originate in the brain and the nerves carry the information to other parts of our body.
From Wikipedia, the free encyclopedia. Letts is a city in Louisa County, Iowa, United States established in 1855. The population was 384 at the 2010 census. It is part of the Muscatine Micropolitan Statistical Area. The name is from local benefactor, Maddison Letts.
Sponsored Topics. Biggsville is a village in Henderson County, Illinois, United States. The population was 343 at the 2000 census. It is part of the Burlington, IAâIL Micropolitan Statistical Area. 2004 British Open golf champion Todd Hamilton attended high school in Biggsville and played on the local 18-hole golf course.