PPT

2. Heart is a completely muscular organ
 The position of heart is behind the sternum
in the thoracic cavity , between the lungs
tilted slightly towards left
 Heart is roughly conical in shape
 Its size is about that of a fist & its weight is
about 250 – 300 g.

3.  Its centre is located about 1.5 cm to the left
of the midsagittal plane.
 It is covered by a double membrane called
pericardium

4.  Pericardial fluid that fills the space between
the PERICARDIUM.
 It protects the heart and also helps it to
function smoothly.

5. CHAMBERS OF THE HEART
 Human heart has four chambers.
Upper 2 chamber ..............ATRIA
Lower 2 chamber ............. VENTRICLE
Atria & Ventricle separated by Muscular wall
 Left atrium opens to left Ventricle
 Right atrium opens to right Ventricle

7. HEART VALVES
 TRICUSPID valve present in between right
atrium & right ventricle.
 It regulates blood flow between the right
atrium and right ventricle.
 BI CUSPID valve present in between left atrium
& left ventricle.