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английский) 3:
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the heart is a muscular organ перекачивающий around 5 to 6 liters of blood per minute.
the human heart is a muscular pump, is divided into four chambers. the two upper chambers are called atria and two ventricles. the lower is.these two types of chambers of the heart with different functions: myxoma collect blood collected in heart and pushing her into the ventricles, and the ventricles of the heart in purging the blood arterythat she goes into all parts of the body.
for pumping blood through the heart in his chambers occur, successive relaxation (диастолы) and reduction (систолы)during which the cells fill with blood and purging its respectively.
heart valves act as gates,giving blood to pass from one cell to another and from the hearts of heart chambers in the associated blood vessels. in the heart has the following valves, tricuspid, pulmonary and aortic, двустворчатый.
кровеночные veins carry blood between the heart and the various tissues and organs тела.существуют the following types of blood vessels: артериолы arteries, capillaries, venules, and veins.the arteries and артериолы carry blood from the heart. veins and venules bring blood back to the heart.capillaries are small blood in which the exchange of nutrients and oxygen between the blood and the cells of various tissues in the body. "the adult is an average of 5 litres of blood.blood consists of a liquid part and форменных elements. the liquid part is called plasma, and union elements consist of red cells, white cells and platelets. plasma is the liquidthe blood cells, and platelets.
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