Yes it is. Involuntary muscles are the ones you can't choose whether or not to move. No one can stop their own heart by sheer willpower.
smooth muscle. stomach
A voluntary muscle is a muscle that is consciously moved by the body, i.e. the muscles in your hand or leg. An involuntary muscle is a muscle that is unconsciously moved by the body, i.e. your heart.
Your heart is a muscle. It is also called the myocardium. The muscle cells in the heart muscle are called myocardiocytes.
the heart is made out of a special type of muscle called cardiac muscle
The heart is a muscle.
The heart is a cardiac muscle
The muscle layer of the heart is the myocardium (or cardiac muscle).
The heart is a muscle so the heart is made of the cardiac muscle.
The muscle of your heart MUSCLE would be your heart.
The heart IS a muscle.
The heart is made of smooth and cardiac muscle
No because your heart is a muscle so there are no muscles within the heart.