From a lack of blood flow which is usually caused by some kind of blockage. If the muscle cells can't get blood, they can't get oxygen and they start to die. This is call necrosis. If the lack of blood last long enough a heart attack will occur.
5 minutes
No, cardiac muscle cells are branched but skeletal muscle cells are linear and do not branch
cardiac muscle cells are joined by intercalated disks.
The myocardium is composed of cardiomyocytes, which are specialized muscle cells that form the heart muscle tissue. These cells are responsible for contraction of the heart and pumping blood throughout the body.
Cardiac myocytes (heart muscle cells) do not regenerate. They can get bigger (hypertrophy), but new cells are not made under normal circumstances. This means that when you have a heart attack or another injury to the heart and cardiac cells die, they are replaced by fibrous scar tissue which does not contract like normal heart tissue does.
Answer for anyone looking is the fact that the cardiac muscle never stops, it cannot, otherwise you would die.
the cell tissue is not in fact muscle tissue its penis tissue
Cardiac muscle cells cannot regenerate, meaning that they have limited ability to repair and replace damaged muscle tissue. This is because most cardiac muscle cells are terminally differentiated and do not undergo cell division.
Cardiac muscle is involuntary striated muscle. The cells of cardiac muscle have only one nucleus. The layer of the heart that contains cardiac muscle is called the myocardium.
so electrical impulses can be carried freely between cells
Cardiac muscle is made of cardiac muscle cells. Cardiac muscle is under the control of the autonomous nervous system and is not susceptible to fatigue
because things are weaker when they are dead.