why is the blood come to heart on two time why
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Ventricular contraction
Blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs. Blood leaves the heart through the aortic valve, into the aorta and to the body. This pattern is repeated, causing blood to flow continuously to the heart, lungs and body.
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because there are 2 artaryes in which one 1 is piyour blood suplayar and 2 ed one is for take the weast and unwanted blood
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