• MoonMelon@lemmy.ml
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      5 days ago

      Deoxygenated, venous blood is dark red. Oxygenated, arterial blood is bright red.

      I was taught the “blood is blue” myth also. My mom was livid, since her job involved drawing lots of blood, starting IVs etc.

      • teyrnon@sh.itjust.worksBanned from community
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        4 days ago

        I called bullshit from the start on that. If it was true, that blood turned red when it touched oxygen, then pulling blood from the vein in a needle would be blue. Teachers told me to shut up.

        It’s such a stupid theory, knowing what we knew.