A Japanese scientist has discovered that human muscles can help predict the weather and other complex, changing systems.

It makes up about 30% to 40% of human body weight in the healthy person ... and in your digestive system. Voluntary muscles are skeletal muscles that contract and relax under conscious control.

The skeleton provides the framework for muscles and gives the body its defined human shape. Cardiovascular system - Edexcel The cardiovascular system is made up of three main parts - the heart ...