• Question: how is blood made?

    Asked by kfcjbang to Greg on 10 Mar 2016.
    • Photo: Greg Irving

      Greg Irving answered on 10 Mar 2016:

      The body controls red blood cell by a hormone called erythropoietin, a hormone produced by the kidneys. Red blood cells start their life in the bone marrow and after approximately seven days of maturation are released into the bloodstream.

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