Cardiac muscle- it is only in the heart and is responsible for the heartbeat.

Smooth muscle- they make up the walls of the organs inside the body.

Parts of the system

Deltoid muscle- they are skeletal muscles and are found on each shoulder.

Pectoralis muscles- they are skeletal muscles and are found on each side of the upper chest.

Rectus abdominus- down under the ribcage are Rectus abdominus (abs)