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Starter Quiz
Question 1 of 6
1
of 6
The heart operates as a double circulatory system. This means:
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it beats twice every minute.
it has two circuits - one that supplies blood to the arms and one to the legs.
there are two loops - one to the lungs and one to the rest of the body.
it works in tandem with the respiratory system to circulate blood.
There are two separate but interconnected circuits that have different destinations.
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