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.
Location of Lettsworth in Louisiana Location of Louisiana in the United States Lettsworth is an unincorporated community located in the extreme northern tip of Pointe Coupee Parish, Louisiana, United States. It lies on the east bank of the Atchafalaya River near its intersection with the Mississippi and Red rivers at the Old River Control Structure. As of 2005, the population is 202. The town's zip code is 70753.