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- $Unique_ID{BRK02377}
- $Pretitle{}
- $Title{Does Blood Turn From Blue to Red?}
- $Subject{blood blue red artery oxygenated vein veins iron hemoglobin oxides
- reddish cells cell arteries oxygen color changes oxide heme}
- $Volume{D-7}
- $Log{
- Red Blood Cells*0002103.scf}
-
- Copyright (c) 1992,1993 Tribune Media Services, Inc.
-
-
- Does Blood Turn From Blue to Red?
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-
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-
- QUESTION: I have a $100 bet with a close friend. He seems to think a
- person's blood is blue and that it turns red when it hits the air, such as
- with a cut or scrape. Now I say that it is red all the time. Can you tell me
- who is right and who is wrong, and a reason why?
-
- ------------------------------------------------------------------------------
-
- ANSWER: Did you really bet $100 on this one? In my day it wasn't worth much
- more than a dime, but you must be one of the last of the big spenders. At any
- rate you are now $100 richer. Blood is always red, a bit brighter in color
- when it comes from an artery and is well oxygenated, and a bit darker when it
- flows from a vein. Air has nothing to do with it. Watch closely as a blood
- specimen is drawn into an empty syringe. No air present there, to change any
- colors, yet it streams forth a bright red. The idea that blood is blue, and
- that royalty possesses blood of this shade, comes from the days when the
- members of the court did little work in the sun, leaving those tasks to their
- peasants. The lords and ladies generally had a delicate, pale white skin,
- against which the blue of the veins could be seen most clearly (yes, veins are
- blue). The tanned and darkened skin of the workers concealed the color of the
- veins, and so the notion that their blood was a different color became widely
- accepted. Later on, when it became clear that the blood in the veins of kings
- and queens is little different than our own, the "changing color" story began
- to make the rounds. However the color is always red, from the iron containing
- hemoglobin. Iron oxides (rust) are always of a reddish color, and so is your
- blood. Next time bet on green blood, there is a great story about that color
- too.
-
- ----------------
-
- The material contained here is "FOR INFORMATION ONLY" and should not replace
- the counsel and advice of your personal physician. Promptly consulting your
- doctor is the best path to a quick and successful resolution of any medical
- problem.
-
-