The right auricle opens into right ventricle through triscuspid.
The right ventricle gives off a large blood vessel which carries deocygenerated blood to the lungs.this blood vessels is guarded by semi lunar valve to prevent backflow of blood into ventricles.
Blood again returns to heart from the lungs in left auricle.now the blood is oxygenerated.
From the left ventricle the blood flows throughout the body through w large blood vessels called aorta. It is again guarded by semi-lunar valves to prevent back flow of blood.
To pump out blood the heart Chambers undergo alternate contraction called systole and relaxation called diastole.
The regular sequence of these systole and distole causes the heart sound LUBB and DUPP. LUBB is produced by the closing of tricuspid and bissuspid valves while DUPP is DUPP is produced by the closing of semi lunar valves.
One heart beat is myogenic in nature ie,it is initiated by a patch of modified heart muscles itself without requriring an external simulation.This patch is thesino- auricular node which is called the pacemaker ,normal heart beat is 72 beats /miHeart failure when S.A. node does not initiate any impulse.
Sphygnomamometre measure the BP.There are two limits of BP higher limit and lower limit.
