Question

explain the heart double circulation?​

Answer 1

Answer:gOxygen rich blood from the lungs comes to the thin walled upper chamber of heart on the left,the left atrium.The left atrium relaxes when it is collecting this blood.It then contracts,while the next chamber,the left ventricle,relaxes,so that the blood is transferred to it.When the muscular left ventricles contracts in its turn,the blood is pumped out to the bodyExplanation:

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