Why do people think that? It is MOST CERTAINLY NOT TRUE. No, no, no! It's a myth that a lot of people believe. Here is why your veins appear blue:
Veins appear blue because light, penetrating the skin, is absorbed and reflected back to the eye.
to everyone who believes that your blood is blue, i'm sorry, but it is wrong. Who agrees and disagrees? Why?
2007-02-23 11:49:16 · 13 answers · asked by taylor ! 4 in Health ➔ Other - Health
For one thing, "blue blood" is traditionally the color of noble blood, so they might just be stuck up.
For another, yes blood is red (I should know, I gave blood from a seemingly-blue vein yesterday, and I may have noticed the color when it came out), but some differentiating points that have been made have slight degrees of truth to them. For example, blood in veins does have a lower oxygen concentration, so it does get slightly darker. But it does not appear blue. Anyone else who has given blood out of a vein, on purpose or by accident (although I hope its on purpose, accidents should be more cappillarry cuts) knows that.
Thank you, have a nice day.
2007-02-23 12:05:54 · answer #1 · answered by Xealot 129 2 · 1⤊ 0⤋
The first answer is WRONG, which bothers me. Arteriolar blood is red because the hemoglobin have got oxygen attached to them. Once the hemoglobin detach the oxygen in transfer, the blood takes on bluer tint, turning the blood MAROON, not blue. Maroon has blue TONES in it.
People think their blood is blue because of scientific posters of the circulatory system, and because of what you said about light reflected back to your eyes. It's just too bad that people believe everything they see.
You were actually wrong with this statement: Veins appear blue because light, penetrating the skin, is absorbed and reflected back to the eye.
It's the right IDEA, but light isn't absorbed THEN reflected. It's either or. The parts of the light spectrum that are absorbed are not seen by the eye, it's the ones that are reflected that we see. This is caused by different textures in objects. Certain textures reflect different colours of the light. White is the presence of all colours in the reflection; black is none.
2007-02-23 12:01:12 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Are you confusing the term 'blue blood' which is used for people who have 'old money' (and usually lots of it) with people who actually BELIEVE they have 'blue blood'? And actually, when it is in the body, blood is more 'blue' than it is 'red' ... because of the light, and also because of the fact that it's only when it hits 'air' that blood turns 'dark red' ...
2007-02-23 12:01:17 · answer #3 · answered by Kris L 7 · 0⤊ 0⤋
actually, i've always thought that the blood traveling away from the heart was red (due to being rich in oxygen) and the blood traveling back to the heart was blue (due to being oxygen deprived) if veins appear blue, then why not arteries? and isn't any visible light "reflected back to the eye" isn't that what vision is?
2007-02-23 11:59:06 · answer #4 · answered by artemisfate 1 · 1⤊ 0⤋
Well, some people actually like to be called "blue blood", which is for nobility, etc.
In anatomical sense, people believe whatever they want unless it is obvious, because people have to believe in something. I've seen people who actually believe in UFOs, or in black magic too. We all have to believe that the earth is a sphere and that everything consists of moleculs. In other words we have to believe in anything that we can not check.
2007-02-23 12:02:56 · answer #5 · answered by Kalistrat 4 · 0⤊ 0⤋
I am glad you know how colour is perceived, but you seem to have forgotten that there is a reason we perceive those colours. Red can not appear blue, they are primary colours.
De-oxygenated blood is bluish, kinda purplish actually.
I'm sorry, but your information is not actually proper.
Blood is not smurf blue, but veinous blood is certainly not red. Though it will appear red when you see it because it contacts air.
2007-02-23 12:00:51 · answer #6 · answered by Noota Oolah 6 · 1⤊ 2⤋
I disagree with you because (and ask any doctor if this is true) before your blood hits the oxygen, it is actually blue and when it hits the oxygen it turns red (try this with an apple cut into it and let it sit on the table what happens is the work of oxygen it turns BROWN!) you can take this with a grain of salt if you don't think it's true. BYE!
2007-02-23 12:45:42 · answer #7 · answered by Anonymous · 0⤊ 3⤋
Because it is! Arterial blood is bright red,crimson almost, but venous blood which has given up it's oxygen is much darker and bluish.
2007-02-23 11:54:56 · answer #8 · answered by Dr Frank 7 · 1⤊ 1⤋
blood is blue inside of you
turns red when it hits the air
read about it at your local library
2007-02-23 11:54:57 · answer #9 · answered by caffsans 7 · 1⤊ 0⤋
I think its dark red,....blue is just some crap people cooked up for attention.....
2007-02-23 11:58:06 · answer #10 · answered by The King 6 · 0⤊ 1⤋