category: Medicine, health

Dmitry D. Bulkin, 9a

report on
?Scientists who have made a contribution to the treatment and study of the cardiovascular system?

From very ancient times, people tried to learn your body,
interested in the functions of various organs and functioning of the heart.
In 1628 published a book of famous English scientist

W. Harvey, entitled "Anatomical study of the heart and blood
animals. In it the author provides a new theory of the circulation, from which,
in fact, began scientific physiology. Harvey argued that the heart
works as a pump, and pressure in blood vessels. There are two terms
circulation: a large range of blood comes from the heart to the head, to
surface of the body, all organs. In a small - it moves between the heart and
Light and saturated with oxygen. This idea of the passage of blood from
small arteries to veins through capillaries was brilliant conjectures Harvey,
based on the determination by means of experiments on animals.

In the 17 th century Italian physiologist M. Malpighi first saw under
microscopic blood circulation in the capillaries and called their capillaries.

In the 18 century was set value of blood pressure.

the 60 th years of the 19 th century French scientist Jean Poiseuille and German
K. Ludwig scientists studied the mechanics of movement of blood as
displacement of fluid in the tubes, and the French scientist E. Marey --
dynamics of the heart.

activity of the heart deeply studied n physiologist Ivan Pavlov.

The activity of the heart of Pavlova regulates 4 centrifugal nerve:
slowing, accelerating, intensifying and weakening. All tissues of the heart,
particularly muscular, abundantly supplied with sensitive elements. Nervous
fibers, which opened a n scientist Tsion, linked through the heart
vagus and sympathetic nerves to the central nervous system. Pavlov
revealed that the ever-changing environmental conditions require constant
regulating the activity of the heart as the central organ of circulation.

This regulation is carried out in a reflex response to stimulation.

Irritant through the nerve fibers regulate muscle
activity of the heart uchaschaya or slowing the heartbeat.

This explains the expressions associated with the activity of the heart "beats from
joy "and" freezes from fear ?.

In 1865, n scientist Vladimir Sutygin first conducted laboratory
studies on blood conservation and revitalization bloodless dogs
blood transfusion incoagulable seven-day storage. Today doctors
widely used method of storing blood and in canned form
further use of it if necessary. Blood conservation
closely related to blood clotting.

the first time, a proper understanding of the nature of the blood coagulation has been given in

1892 n scientist A. Schmidt, who suggested and experimentally
substantiated enzyme (fibrinogen) theory of blood clotting,
mostly retaining their scientific and practical importance to the present

1 end and the beginning of the twentieth century. Marked by two Wy

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