The heart is probably one of the most basic of human organs: a blood-filled hollow muscle, which together draw blood in the arteries can squeeze. Valves prevent the blood flows back when the muscle wall relaxes. The function of the heart is pumping blood around the body, mainly on the way in which oxygen and nutrients are carried on the back and waste. It made the heart muscle itself is so much work and a good blood supply to the heart itself of the greatest importance. The coronary arteries take care of this. For the various disorders of the heart, blood vessels and blood to that description.