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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?.

1 Answer

3 votes

Answer:

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

User Leeroy Hannigan
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