The lesson we really ought to learn from all of this is that D - you're unlikely to get control of your life when you blame others for your mistakes. Knowing when you were the one who was responsible for his mistakes is a good characteristic to have in life.
Answer:
<em>Cardiac muscles are found only in the heart. They regulate the contraction and relaxation of the heart, which helps in pumping blood through the circulatory system. The movements of the cardiac muscles are involuntary. They are important in sustaining life.</em>
