Explanation heart

Explanation heart:

We all know the heart and knows where heart is located ..
The work of the heart:
Heart reacts with human emotions and psychological condition
And is in the installation consists of muscles combines qualities of voluntary muscles and involuntary muscle
It beats an average of 72 times per minute in an adult at rest
= 2.5 billion times in 66 years.
It works to pump blood to the whole body, and works ceaselessly length of human life

 

Heart pumps four and a half to five liters of blood per minute, and more than three times during physical effort. And use 7 percent of the oxygen that is pumped to the body, there arteries go to the heart muscle to fed blood as it emerges from the aorta the main immediately after his release from the heart, and this is very important because heart aunt always working and needs oxygen continuously when interruption of blood supply oxygen-rich for (part of) the heart muscle the person feels pain in his chest which is what we call: angina pectoris.
To look to the heart:
It is composed of strong muscles which about the size of a fist and within four cavities and between each cavity and the other valve.

Let's imagine how the heart is:

The heart consists of four chambers: atrium left atrium right ventricle left ventricle right.
Blood accumulates (venous reflux of the organs of the body) to the heart through two major Reden: intravenous hollow top and hollow vein below. Enters in the right hand heart that you pay to the lungs to get rid of carbon dioxide and increases oxygen, then back to the left hand heart, that you pay to the body again.
Between veins and arteries and heart chambers Siran valves prevent the blood in the opposite direction, and Snscherhaa more in the coming days.