When muscle cells are viewed under the microscope, one can see that they contain a striped pattern (striations). This pattern is formed by a series of basic units called sarcomeres that are ...

This is why they usually work a joint in pairs. One muscle of the pair contracts to move the body part, the other muscle in the pair then contracts to return the body part back to the original ...

In adolescents and young adults, they could be connected to a body image disorder that exhibits a pathological focus on muscle development and leanness, according to new research. “The use of 6 ...