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4 votes
Which of the following statements is correct? (1 point)

O The circulatory system is made of the heart and a network of red blood cells.
O The circulatory system is made of the lungs and a network of blood vessels.
O The circulatory system is made of the lungs and a network of red blood cells.
O The circulatory system is made of the heart and a network of blood vessels.

1 Answer

4 votes
The last one the circulatory system is made up of the heart and blood vessels
User Iakobski
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