What do red blood cells do?
A. Carry carbon dioxide to the rest of the body from the lungs, while taking oxygen back to the lungs to be exhaled
B. Fights of infections and bacteria
C. Makes our blood red
D. Carry oxygen from the lungs to the rest of the body, while taking carbon dioxide back to the lungs to be exhaled
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What are blood vessels?
A. Parts of the body that are filled with lots of blood
B. Organs that give blood
C. Tubes that blood travels through
D. Different locations in the heart
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