Tags: Anatomical Structure.
The human heart is a vital organ that functions as a pump providing a continuous circulation of blood through the body by way of the cardiac cycles. The heart is contained in the mediastinum in the thoracic cavity of the thorax.The heart is enclosed in a protective sac the pericardium which also contains a lubricating pericardial fluid. The outer wall of the heart is made up of three layers the epicardium the myocardium which is the muscle of the heart and the endocardium.
