What are the main muscle groups in the human body?

The muscular system provides movement for the human body. There are three types of muscles, skeletal, nasty, cardiac muscle.

Skeletal muscle – consists of muscle fibers attached to bones or to each other by flexible, strong tendons. Skeletal muscles are the most abundant in our body. They contract spontaneously and obey our will of movement.

Smooth muscles – made up of short fibers, they are found in the walls of the bladder, respiratory tract, eyes, uterus and digestive organs.

The heart muscle (myocardium) is muscle tissue that does not occur in other organs. It relaxes and contracts automatically. A pacemaker is a group of cells that controls the heart rate.