Heart is hollow muscular pumping organ formed of cardic mucles fibers and beats spontaneously an d rhythmically through out the life. It is enclose in a double walled pericardium .Its cavity is called pericardial cavity. it is filled with a fluid known as pericardial fluid.
It is shock absorbing and lubricating fluid.
Size of Heart:- Its size is of person’s fist. It is measures about 12cm in length and 9cm in breath
Weight:- Its weight about 300gm.
Chambers of heart:- There are four chambers in human heart:-1. right atrium 2. right Ventricle 3. Left Artium, 4. Left Ventricle.
- Tricuspid Valve
- Biscuspid Valve
- Valve of Eustachius
- Valve of thebesius
- Semilunar Valve,.