4. What substance in RED blood cells carries oxygen to the cells?
O blood vessels
O plasma
O haemoglobin
O platelets
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0
Answer:
haemoglobin is the correct answer
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Hemoglobin is the oxygen-carrying protein that is found within all RBCs. It picks up oxygen where it is abundant (the lungs) and drops off oxygen where it is needed around the body. Hemoglobin is also the pigment that gives RBCs their red color.
Hence,haemoglobin is the correct answer
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