Even as a kid I thought that was stupid. If blood is blue in the body and only turns red when it touches oxygen, then why is it red in the water?
I was told that’s only in the movies. In real life it would be blue.
But then again I got a detention for arguing that the moon is visible during the day. The detention was because I pointed out to the window and said look, and she was embarrassed.
Ohh yes, classic detention for proving the teacher wrong. There’s a depressing amount of teachers who rule by their ego instead of by science. It’s why I now consider my school discipline record as a source of pride instead of shame.
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.
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.
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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Even as a kid I thought that was stupid. If blood is blue in the body and only turns red when it touches oxygen, then why is it red in the water?
I was told that’s only in the movies. In real life it would be blue.
But then again I got a detention for arguing that the moon is visible during the day. The detention was because I pointed out to the window and said look, and she was embarrassed.
The answer is obvious, dissolved oxygen in the water–duh!
Because there’s oxygen in water. That’s what fish breathe!
Ohh yes, classic detention for proving the teacher wrong. There’s a depressing amount of teachers who rule by their ego instead of by science. It’s why I now consider my school discipline record as a source of pride instead of shame.
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That’s wild to me cos like… We didn’t need internet to tell us this was incorrect.
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.
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.
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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You look when they draw blood?
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My first thought was how ears and noses look red when sunlight shines through them. If blood was blue, wouldn’t they be blue or purple?
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