Respuesta :

Answer: Iron

Explanation:

hemoglobin: The iron-containing substance in RBCs that transports oxygen from the lungs to the rest of the body. It consists of a protein (globulin) and haem (a porphyrin ring with an atom of iron at its center).

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ZzainabB

Answer:

Iron!

Explanation:

There is haemoglobin, an iron complex in the middle of a red blood cell, which helps the red blood cell carry oxygen around the body!

Hope that helps!

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