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Question

Identify the correct statement regarding blood circulation.

A
If blood flows through the heart twice for completing one circulation, it is called double circulation.
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B
If the blood flows through the heart twice for completing one circulation, it is called single circulation.
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C
The blood that is pumped by the heart after reaching the body parts does not return to the heart.
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D
To keep the blood moving, the heart does not need to pump the blood continuously.
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Solution

The correct option is A If blood flows through the heart twice for completing one circulation, it is called double circulation.
If blood flows through the heart twice for completing one circulation, it is called double circulation. Majority of mammals utilise a double circulatory system. Double circulation gives the ability to create more pressure to pump blood round the whole body system. There is separation of oxygenated and deoxygenated blood in double circulation.

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