1254
Blood is blue until exposed to oxygen (lemmy.dbzer0.com)
submitted 1 year ago by to c/whitepeopletwitter@sh.itjust.works
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[–] 9 points 1 year ago (9 children)

That's wild to me cos like... We didn't need internet to tell us this was incorrect.

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  • [–] 12 points 1 year ago* (last edited 1 year ago) (7 children)

    It's not like it doesn't have some logic to it. Blood carries oxygen throughout the body and then cycles back through the lungs to get more oxygen. So when you look at your arms and see the blue veins we just thought that was obviously the deoxygenated blood returning to the heart.

    It made basic sense, so no one was running down to the library to check out a medical textbook to disprove it.

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  • [–] 8 points 1 year ago (4 children)

    Ever see a blood draw? Blood comes out of a vein, into a non-O2 environment.

    I think we just don't do as much critical introspection as we like to think. Its easier to imagine maybe there was a tiny amount of O2 or something than that the thing we were taught was entirely false.

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  • [–] 3 points 1 year ago (1 child)

    I think we just don’t do as much critical introspection as we like to think.

    It's definitely true, and it shows that the stuff you learn as kids is even more ingrained than we even notice most of the time. Kids don't normally have blood drawn, so it's not like elementary schools were filled with a bunch of kids saying "wait a minute, that didn't happen with my last blood draw."

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