Human heart is triangular shaped in which upper portion is broad and lower portion is conical.Human heart is present in left side of the human body.Its upper layer is made of double membrane is called pericardium and in between layers,a pericardium cavity is present which helps the blood to flow in every part of body.

Heart have four chambers namely two auricles and two ventricles.The two auricles is also known as atria and these auricles are present at the top of ventricles.Heart has two parts.In one side one auricle and one ventricle is present and on the other side one auricle and one ventricle is also present.These chambers are separated by an boundary.

The outermost layer of auricles are very hard and thin which is separated by an boundary,which is called inter-auricular septum.Ventricle are also made of hard muscles and thick walled,which is also separated by an value ,which is called inter-ventricular septum.These values helps the blood to flow in one direction and it is the major function of these values.

 When heart contracts,the impure blood goes to right atrium through a large vein,which is called a large vein.After oxygenation,the blood come again in left atrium.From here the oxygenated blood goes to all parts of body.The blood supplied through a body by large artery,which is called aorta.From here the oxygenated blood goes to all parts of body.The blood supplied through a body by large artery,which is called aorta.

In human,oxygenated blood is present on left side and impure blood is in right side of heart.The blood flows in all parts of heart,with the help of arteries and veins.The heart play very important role because if heart is not worked properly ,then human being cannot live.And if heart work properly,then human being can live.So,without heart human's life cannot possible.So,human being thanked ALLAH.ALLAH also gave different things for human being to observe his almighty.So,heart can perform his worked properly and in time because of ALLAH.