Muscular system Muscular system The muscular system is an organ system consisting of skeletal, smooth and cardiac muscles. It permits movement of the body, maintains posture and circulates blood throughout the body. The muscular systems in vertebrates are controlled through the nervous system although some muscles (such as the cardiac muscle) can be completely autonomous. Together with the skeletal system, it forms the musculoskeletal system, which is responsible for movement of the human body. There are three distinct types of muscles: skeletal muscles, cardiac or heart muscles, and smooth (non-striated) muscles. Muscles provide strength, balance, posture, movement and heat for the body
Edmund Alexander Parkes Exercise on the Elimination of Nitrogen". He confirmed independently the observations of Adolf Eugen Fick and Johannes Wislicenus, against Justus Liebig's theory that muscular work implies the destruction of muscular tissue by oxidation. Parkes suggested that the elimination of urea is not dependent on the amount of muscular exercise, but on the consumption of nitrogenous food; and that muscular tissue does not consume itself as a fuel doing work. His experiments on the effects of alcohol on the human body (in which he was assisted by Cyprian Wollowicz) were in three papers (in 1870, 1872, and 1874), on the "Effects