Archive for the 'sign of heart disease' Category

The Heart and Its Functioning and Structure

Thursday, June 19th, 2008

The heart is placed behind the breast bone and within the ribs (thoracic cage) with the lungs on either side. It is a hollow muscular organ made up of smooth muscles (myocardium). It is enclosed in a sac known as the pericardium (outside layer), and shaped like an egg, is about the size of a [...]