Why movements bring vitality, joy and health

Today it is unthinkable to imagine a strong-willed, energetic person who is not, would be involved in physical culture and sport. Those who do physical exercise, healthy people with strong character, always collected and aged in any life situations. In sports strengthen not only physical but also spiritual. Why is this happening?
In the age of scientific and technological revolution man has made tremendous progress in the knowledge of the surrounding nature. But in research labs still do not cease to think of many unsolved mysteries of the human body. Take heart. Person-it weighs 400-450, a body the size of a fist performs per day with work corresponding to lifting of cargoes weighing 800 kg at height of 20-25 m Every hour it is reduced 4200 time and draws approximately 300 litres of blood per day through the heart it takes about 7200 HP Could it be the only pump on such an important area of activity as the pumping of blood through the vessels? As in other parts are paired organs-kidneys, lungs, organ of vision, hearing. Have no heart helpers?
This question has long excited to many minds, but to answer it was not so easy. At the beginning of our century English physician M. C. Janowski (1854-1927) proposed the idea of "peripheral arterial heart." Assistants heart he believed the peristaltic movement of the peripheral vessels, working in unison with the heart. However, this hypothesis, as unfounded, was rejected by developing science and heart for a long time remained lonely working Organ, "which plays extensive" blood on numerous vessels in the human body.
If you look at the scheme U. of William Harvey (1578-1657), we see that the blood in arteries, capillaries and veins cutting across all organs and tissues of our body, moving from the left ventricle into the right ventricle. The farther from the heart, the smaller arteries and go to thin the blood vessels, invisible to the naked eye. It capillaries. Lumen their equal 0,005-0,01 mm they supply blood to all parts of our body, carrying oxygen, nutrients and taking carbon dioxide and other products of metabolism. Their number is enormous. The length of the capillaries large circulation, at a very rough estimates reaches 8000 km They merge with each other, forming a small veins turning into large and ending in the right atrium. The completion of the whole blood (about 3-5 l) in a large circle circulation lasts about 1.5 minutes:
From the right atrium to the right ventricle of venous blood is sent to the blood vessels of the lungs. There it is enriched with oxygen absorbed from the air, and pulmonary veins arterial blood returns to the left atrium, making small (pulmonary) circulation.
With each contraction the heart ejects about 70 ml of blood into the aorta and the same number in the pulmonary artery. At rest, the blood in the body is distributed as follows: 25% of the total volume passes through the muscles, the same amount through the kidneys, 15% is in the blood vessels of the intestine, 10%of the liver, 8% - of the brain, 4% - in coronary vessels of the heart, 13% - in the vessels of the lungs and other organs.
Functioning of the cardiovascular system can be compared with the carefully crafted mechanism, where a coordinating influence belongs to the Central nervous system. In addition to the nervous regulation of the cardiovascular system is under the influence of various hormones and chemicals circulating in the blood.