What Color is Blood REALLY? (6 min version)

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this last February I posted a video

about red blood cells and the heart it

was a short little clip that followed

several blood cells as they went through

the heart got oxygen and delivered it to

the rest of the body I'm so blue when I

don't have o to it's time to go to the

heart and right after I posted it one of

my patrons replied that she thought I

might like to know that human blood was

never blue now before we go further I

want you to consider what you believe

about blood and why is what always red

is it red when it has oxygen but blue

when it doesn't have oxygen what

evidence do you have to support your


and now I'll tell you why I thought

blood was blue when I was a kid

several adults told me that blood was

blue without oxygen I remember a teacher