Yes
A voluntary muscle is a muscle that is "controlled by an individual's will". Meaning, you can control it or operate it. An involuntary muscle is your heart, because your heart automatically, or involuntarily beats and so on, keeping you alive.
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 cardiac muscle
The heart is a 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.
The heart muscle is also referred to as the cardiac muscle (myocardium).