3. Understanding Heart
Complete muscular organ.
Situated behind the sternum in thoracic
cavity, between the lungs tilted slightly
towards left.
Adult human heart : roughly conical shape
having 12cm long, 9 cm broad and weighs
300 gm.
4. More on the organ..
Covered by Pericardium, a double
membrane.
Space between Heart and Pericardium is
filled with Pericardial fluid which protects
heart.