Heart :-
A muscular pumping organ that pumps out the blood into the blood vessels is called heart.It is a muscular organ whose size is as big as our first.It is situated in between the lungs slightly tilted towards left.
Functions:-
- The different chambers of the heart are as follows:-
a) -Atrium( upper chamber) There are two artium , i.e left and right .
-Left artium receives oxygenated blood from the lungs via pulmonary vein.
-Deoxygenated blood enters to the right artium as it expands.
- Right and left artium are separated by interaurical septum .
- The wall of artium are thin to receive the blood through vein.
b) Ventricles:-
-They two inferior chamber of heart are right and left ventricle separated by a. interventricular septum.
- When left artium contract s while left ventricle expands , do blood is transferred to it.
-When right artium contracts the corresponding Lowe chamber , I e the right ventricle dialets.
-Deoxygenated blood thus, enters in it which inturn is pumped to lungs for oxygenation.

Heart is the pumping organ....act as a pump...n helps toh pumped blood throught the body