What is the Richter Scale. The Richter magnitude scale (often shortened to Richter scale) is the most common standard of measurement for earthquakes. It was invented in 1935 by Charles F. Richter of the California Institute of Technology as a mathematical device to compare the size of earthquakes.
Like most systems in the body, the muscular system does not work in isolation. The most obvious systems that interact with muscular system are the skeletal system, the nervous system and the circulatory system. Muscles are also involved in the digestive system, the respiratory system and the immune system.
The body has three types of muscles: smooth, skeletal and cardiac. The muscular system controls smiling. Skeletal muscles are linked to the bones in the skeleton with the help of tendons. Most of a person's internal organs are lined with smooth muscle. An illustration of the human muscular system.