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35 votes
35 votes
There are so many of us you will probably have a hard time seeing just one of us. I am small but i have a big job. I make compounds that build your muscles, fight disease, transports oxygen, and speed up your metabolism. What am i?.

User Shane Kenyon
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2.5k points

1 Answer

18 votes
18 votes

Answer:

BLOOD CELLS RBC it has hemoglobin with helps in oxygen transportation and RBC that improves metabolism and fight disease

User Cubesnyc
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