Question

what do you mean by double circulation of blood? one words answer ​

Answer 1

double circulation of blood occurs in human when blood moves from heart to body and from lungs to heart in two pathways .

Answer 2

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It is called a double circulatory system because blood passes through the heart twice per circuit. The right pump sends deoxygenated blood to the lungs where it becomes oxygenated and returns back to the heart. The left pump sends the newly oxygenated blood around the body.