A hearty muscle:

The muscle that makes up the heart is called the cardiac muscle, it is also know as the myocardium, the thick muscle of the heart that contracts to pump.


What is it? Is a type of muscle that work by his own.
Function: Produce contractions of the heart to pump blood to the body
Working: Electrical activation of the muscle produce contraction of the ventricle.
Never stop, only when a cardiac arrest is coming
sports


key words:
Involuntary muscle. Most important send blood body. Never stop. Sports good. Only stop in cardiac arrest. Ventricle electrical activation sends the blood and oxigen blood muscle move.