jmnixon95 wrote:
Blood cells are on a scale which goes roughly like this:
Very bright red
Darker red
Maroon
Dark purple
Dark blue
Black
This is representative of the quantity of oxygen in those cells, with a healthy level of oxygen for your body being the bright red kind. As you run low on oxygen, the cells go down the spectrum.
As a visible example, if you watch Caucasian athletes who are exerting themselves, to the point that their muscles don't have enough oxygen, then you will see their skin go reddish. This is because the darker shades of red and maroon are more visible through their light coloured skin.
Another visible example is anyone with poor circulation will progressively get darker and darker. Often people with poor circulation to their legs will have dark blue patches.
Or the old experiment kids used to do (at least I did), of tying an elastic around a finger as a tourniquet, turning it until the blood-flow is cut off, the finger going through the spectrum toward black.
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