THE HEART IS A POWERFUL MUSCLE ABOUT THE SIZE OF A GRAPEFRUIT. LOCATED JUST LEFT OF
THE CENTRE OF THE CHEST,IT OPERATES AS TWO COORDINATED PUMPS,SENDING BLOOD
CONTINUOUSLY AROUND THE BODY.THIS CIRCULATION CARRIES OXYGEN AND NUTRIENTS TO ALL
ORGANS AND TISSUES AND ALSO REMOVES HARMFUL WASTES.A SPECIALIZED TYPE OF MUSCLE
CALLED MYOCARDIUM IS FOUND ONLY IN THE HEART