How the human heart works

The  human heart is a hollow organ surrounded by strong active muscles from  the outside, and envelops the membrane muscle known as the peritoneum. The  heart is located in the middle of the rib cage above the diaphragm and  the left side is slightly tilted, the heart is the size of the fist and  is able to pump blood to a distance of ten meters. The function of the heart is that it acts as a suction pump for the  non-pure blood returned to it from the body parts by the veins, and as a  pump pump for pure blood flowing to distribute it to all parts of the  body through the arteries

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Heart synthesis
The heart consists of four chambers: two upper, two lower, and the upper chambers are known as right and left atria.

The heart is divided into two parts: the right part; it consists of  the right atrium and the right ventricle, and the left part consists of  the left atrium and the left ventricle.

The valves between the upper and lower chambers of each side: the  valve located on the pulmonary artery and aortic arteries, valve  openings of the upper and lower vena cava and pulmonary vein

How the heart works

The blood veins - the upper and lower hollow veins - move the unclean blood from all parts of the body to the right atrium

The right muscles of the right atrium begin to contract; the amount  of blood is moved to the left ventricle by the valve separating them, a  triangular valve opening in one direction.

The muscles of the left ventricle contract and the non-oxidant blood is pumped into the lungs by the pulmonary artery

It also passes through pulmonary capillaries. In pulmonary capillaries, carbon dioxide is expelled from the blood, and oxygen is extracted from the alveoli

Oxidized oxygen-oxygenated blood begins to return to the left atrium of the lungs by right and left pulmonary veins.

Once the oxidized blood reaches the left atrium, the muscles begin to  constrict; they reach the left ventricle through the valve known as the  mitral joint

The muscles of the left ventricle contract to push pure oxidized blood to all organs of the body by the aorta

Heart characteristics
The heart is a human pump that works to draw blood from the body, treat it, purify it and then pump it again.

Myocardium is a permanent muscle that never ceases to contract

The heart rate is about 70 times / minute, pumped about 70 ml / time,  and the amount of blood pumped from the heart is measured in the right  or left part of it - that is, the heart's part doubles twice the amount  each time

The heart when exerting muscle can pump up to 35 liters of blood / minute. The average amount of blood in the body for adults is five liters