The efficiency of the heart
heart starts pounding for 8 months before the birth of any person and does not stop his work throughout his life.The heart never sleeps and does not rest, it can only slow down the rhythm of their work.
If we perform hard physical work or make a run, our heart works twice as fast as usual.Normally, as it beats at a rate of 60-72 beats per one minute.If you resort to simple arithmetic calculations, it is easy to calculate that a day (if the day is calm), it makes 100 thousand blows per month - 3 million.On average, only for one day the heart pumps 13 to 25 thousand liters of blood.Such performance can not reach any one machine.Even an ordinary pump, made of metal, may not work more than 10 years, but the heart is not made of metal!One can only wonder our mother nature, who managed to create such a miracle.
We do not notice the work of our hearts as long as it does not hurt.their car or motorcycle we care much more than their health, which, of course, unacceptable.But the observance of elementary precaut
lungs and heart are working in a close relationship.With each breath in fresh blood to a portion of the oxygen, which makes the blood bright red and relieve it of excess carbon dioxide.Blood from the lungs enters the left atrium, the left ventricle is pumped from an artery.
Such transportation network of our cardiovascular system.As it is delivered to the cells of nutrients
capillaries head and upper: departments tulovischa-
small and big circles adult circulation, salts, water, oxygen and trace elements, and climb "waste products" - products of decomposition of mineral and organic substances, unnecessaryimpurity, carbon dioxide.
But each transport network needs constant care, and heart - power plant - in a good fuel.If we stick to a healthy lifestyle, eat properly and not abuse tobacco, alcohol and caffeine (coffee, tea, chocolate), then our hearts will be able to work a very long time without major repairs.