Your heart
The myocardium, or heart, is the most used muscle in the body.
The diaphragm, it is the main muscle used for breathing.
the most stronger muscle in your body is your leg muscle because it holed everithing in your body.
cardiac muscle is only found in the heart so it is used constantly but it isn't the most common muscle found in the body, this would be skeletal muscle.
the tung
In the human body, the host used muscle would be the tongue, or facial muscle muscles (provided you are not paralyzed). The most used organ would be the heart.
The heart, as it is a four-cambered muscle that continuously (we hope!) pumps blood round the body.
Skeletal muscle is the most common type of muscle in the body. It is attached to bones and is responsible for voluntary movements like walking and lifting objects.
the tung
the tougne is the strongest musce in your body!
yes
Your mouth. Your tongue is actually the most strongest muscle in the human body.