Is blood blue or red?


Is Blood Blue Or Red?  

497 members have voted

  1. 1. Is Blood Blue Or Red?

    • Blue
      104
    • Red
      393


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blood is blue until it reaches outside the body, then its red

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**BUZZ** Wrong answer.

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lol...funny thread.

...but yea ... blood is red (bright red = oxygenated and darker red = deoxygenated) <-- I know that has been stated many times already...but it is the correct answer to the question of this thread.

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both, blue in the vane and red when u bleed (my moms a nurse i asked her once)

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Your nurse mom thinks blood is blue? Where does she work? Because I don't ever want to go near the place.
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Blood is a bright red if it's oxyginated blood on the way to the heart, and a dark red (looks blue through the skin) when it's leaves the heart without any oxygen. :happy:

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it is blue when deoxgynated and red when oxgynanted Oxyheamoglobin is red, and this is formed when oxgyen and heamoglobin are present together, affer the oxgyen has diffuised it will turn blue. this interaly depends on where in the body you are refering too.

^beat me to it, and carbon diioxde also bonds to heamoglobin,

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Blood always has oxygen in it, even on it's way back to the heart/lungs. It's never completely "empty."

Bood inside the body is blue.

Not until it is exposed to oxygen outside of the body does it

turn red.

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And what's different about blood inside the body from blood outside the body?

Blood has nothing in it that would make it appear a blueish color.

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Whoa, where did this idea that blood was blue come up?

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The Kings, Queens, Prince and Princesses had blue blood :) That's what made them royale..

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Human whole blood is red, whether it be from a vein, capillary or artery. When a tube of whole blood is centrifuged, formed elements in the blood (your red blood cells, white blood cells, platelets etc.) settle to the bottom. This is red in colour. The serum/plasma fluid portion of your blood is at the top of the tube and this is usually a pale straw colour.

I am a medical laboratory technologist and I draw blood and analyse it for a living.

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when the blood is in the body it is blue.. once exposed to oxygen it turns red, i studied this in physical education and was on my exam so don't say im bull****ting lol

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So when I had blood drawn the other day, as it was being drawn into an airtight syringe, why was it red?

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when the blood is in the body it is blue.. once exposed to oxygen it turns red, i studied this in physical education and was on my exam so don't say im bull****ting lol

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Wtf, I work in medicine, I'm not an idiot. IT IS NEVER BLUE, I've seen blood inside people before it hits air. Plus there is always oxygen around, so that whole argument doesn't work. If there wasn't, there'd be no point for hemoglobin (or hemocyanin) as they help our blood cells carry the oxygen.

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here goes: (i dunno if anyone else has posted anything with this relativity, sorry if so, i dont wanna read thru all the pages sorry :D)

Regardless of location (outside or inside body) blood is red. Hemoglobin associates with oxygen as well as carbon dioxide, depending on which one is more abundant at any given time in the body (ie in the lungs the hemoglobin associates with oxygen) thus the blood gets a very red color (bright and rich).. blood that is further from point of oxygen-saturation (ie fingers, etc) has oxygen taken out of it by cells in order to do their thing.. and thus the hemoglobin associates itself with carbon dioxide. This makes the blood much darker red.. but nonetheless it's always red. The "blueness" is from the return veins that are void (essentially) of oxygen and looking through translucent skin at blue vein walls which gives a blueish tint.

Blood actually loses some of it's bright redness (becomes darker) when it "hits air" because it's no longer pressurized above 1atmosphere standard pressure therefore the hemoglobin/oxygen assosciation is not as strong as when it's pressurized in the body.. any high-flow oxygenated artery will be bright regardless of pressure because it's so heavily oxygenated :D

hopefully that offers insight for those curious :p

Edited by deNuo
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I can't believe how many idiots there are on the Internet. -_-

I mean, OK, maybe you screwed up, you were a little mistaken, it could happen to anyone. But when the whole thread starts to fill up with people who actually know what they're talking about and you're still like 'druuuurrrrrr blood is blu lollll', you're beyond forgiveness.

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I've heard this old wives tale for years. The reason people think the color of blood is blue is because veins on your arm and other parts of the body are blue.

A better explanation is why are veins blue in color and not red.... :cool:

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Dunno if this was posted before or not (so please don't slam me)

The only animal which actually has blood is the octopus.

Here is quote about this from this website which explains it.

Octopus blood contains the copper-rich protein hemocyanin for transporting oxygen. Less efficient than the iron-rich hemoglobin of vertebrates, the hemocyanin is dissolved in the plasma instead of being bound in red blood cells and gives the blood a blue color.

www.biologydaily.com/biology/Octopus

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...

The only animal which actually has blood is the octopus.

....

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lol i'm not slamming you b/c i know you just negated to put in the word blue.. but that just made me laugh :D

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I can't believe how many idiots there are on the Internet. -_-

I mean, OK, maybe you screwed up, you were a little mistaken, it could happen to anyone. But when the whole thread starts to fill up with people who actually know what they're talking about and you're still like 'druuuurrrrrr blood is blu lollll', you're beyond forgiveness.

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isn't that truth... :yes:

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Your nurse mom thinks blood is blue?  Where does she work?  Because I don't ever want to go near the place.

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lol... seriously. no wonder someone didn't become a full fledged doctor. hard to imagine how she became a nurse even...

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Wow, no offense, but this is one of the dumbest topics I've ever seen. "Red" blood cells aren't all that blood is. That's only 45% of the actual "blood" volume... So if you're refering to red blood cells , blood is bright red when traveling away from the lungs, blood is dark red (has a tiny bit of a purplish red tint) when travelling to the lungs. Your veins look blue because of the combination of the dark red de-oxygenated blood and the vein wall lining. :p :whistle: :D However, the red blood cells make blood the color it is... so there's your answer. :pinch:

Edited by xcopmanx
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isn't that truth...  :yes:

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And you wonder how conspiracy theories start? It's no real surprise - a group of people start convincing others of their beliefs, completely ignoring evidence to the contrary (hence the 'Moon Conspiracy').

Still, I'm expecting more people to come into this thread and swear blood is blue, or that they did such and such an exam that said it was blue so everyone else is wrong. This thread is so hillarious when the "blood is blue" people start getting all defensive... it's really made my day. :rofl:

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Well, as many people have already stated, if one of the main purposes of blood is to carry oxygen, then it will always have oxygen. According to that 'theory', blood would be blue just a fraction of a second or something

Hemogobline is the thing that interacts with the oxygen, it's a red pigment. It's the same case as chlorophile interacting with sunlight and beeing green.

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lol... seriously.  no wonder someone didn't become a full fledged doctor.  hard to imagine how she became a nurse even...

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ROFL, agreed.

It's red. Just watch horror movies. :rofl:

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