The human body has more than 600 major muscles. Skeletal Muscles hold the bones of the skeleton together and make the body move.
Skeletal muscles vary greatly in size, depending on their function.
For example, eye muscles are small and fairly weak, but thigh muscles are large and strong. The ends of most skeletal muscles are attached to bones by a tough, flexible connective tissue called tendon . The other end, the insertion , is attached to a bone that moves when the muscle contracts. Skeletal muscles act in pairs called flexors and extensors. For example, the hamstring muscle at the back of the femur is a flexor.