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The heart







The heart is a muscle of a small fist-sized large works like a pump pumping the blood in the arteries and then to parts of the body as the other that it receives blood returning from the veins, and heart-shaped grain of pears inverted stationed in the chest, tilted slightly towards the left and there in the heart of four rooms, two Aleutan called Atria and two Sfletan called ventricles which are of the wall of thick muscle, and that the heart beats 60-80 beats per minute, and pulses is a contraction and relaxation of the heart muscle to be pumping about 3-5 liters of blood per minute, and feed the heart muscle of blood vessels surrounded by Any blockage of leading to death.






    









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