The heart is a muscular organ located in the thoracic cavity, between the lungs and behind the sternum. It consists of four chambers (right atrium, left atrium, right ventricle, left ventricle) and valves (tricuspid and bicuspid) that manage the flow of oxygenated and deoxygenated blood. The pericardium is a protective double-layered membrane that encases the heart, safeguarding it from infections and reducing friction during beats.

1. HEART
SUBMITTED BY,
ANU VARGHESE
NATURAL SCIENCE

2. HEART
 Heart is an organ made up of muscles that is situated slightly tilted
towards the left in thoracic cavity.
 It is situated between two lungs and behind the sternum.

3. PERICARDIUM
 Pericardium is a double layered membrane that covers the heart.
 Pericardial fluid which in filled in between these membranes protect
the heart from external shocks and helps to reduce friction between
the membranes when the heart beats.
 It act as a barrier preventing harmful germs from reaching the heart.
Thus protect the heart from infection.

4. CHAMBERS OF THE HEART
RIGHT ATRIUM
LEFT ATRIUM
RIGHT VENTRICLE
LEFT VENTRICLE

5. NOTE:
Left side of the heart carries oxygenated blood
and right side of the heart carries deoxygenated
blood.

6. VALVES IN BETWEEN
CHAMBERS
 TRICUSPIC VALVE: Present between right atrium and right
ventricle
 BICUSPID VALVE: Present between left atrium and left
ventricle
 Function: To prevent backflow of blood

7. STRUCTURE OF HEART
Deoxygented blood enters the right atrium from superior and inferior vena
cava.
Blood in right atrium flows through tricuspid valve into the right ventricle
From right ventricle CO2 contained blood move to lungs through
pulmonary artery
From lungs oxygenated blood move towards the left atrium through
pulmonary vein.
Blood in the left atrium flows through bicuspid valve into the left ventricle
The oxygenated blood move through aorta to different body parts..

9. THANK YOU