the true color of blood...

It isn't a misconception, deoxygenated blood is blue, when the oxygen in the blood had been used by the muscles the blood is the deoxygenated and blue until it is pumped to the lungs where is makes contact with oxygen which turns it red again. which is why when you get a cut blood is red... because of the oxygen in the air
oxygenated blood carry 2 oxygen molecules, the (shape) of the molecules allows blue and green light to be absorbed and red light to be reflected hence giving it the red color. However, when the cell is fully deoxygenated then the conformation of the molecules allows light from the orange spectra to be absorbed and reflecting blue light giving blood a blue tinge.

any body for comments?
i need discussion not flaming and insulting others.pour in your views and let others do the same.

half people say its dark red half say its blue/purplish,even internet is divided on this.
any body done a experiment/research on this personally and practically. i mean not just theoritical

thanks

Bump

Yeah it has both colors. And may be its Haemoglobin thats responsible for its spectra.

Well.. I'm blue-blooded anyway

the blood in veins! almost blue colour.. did anyone forget to mention that??! i'm in for it! deoxygenated blood is blue...

count the green color in also.

why not yellow?

GOOD INFO, REALLY I DIDN'T KNOW ABOUT THIS, coz i'm a technical student. thanks,

BUT IS THERE anyway to see the blood in blue color?

Intel_Gigacore said:
why not yellow?

GOOD INFO, REALLY I DIDN'T KNOW ABOUT THIS, coz i'm a technical student. thanks,

BUT IS THERE anyway to see the blood in blue color?

not really,@least i dont know.
this is still a debated issue(i found this on net that people are always engaged in discussion)

ill try to search and find out,if i get ill let ya kno

Bump

Oxygenated blood is actually BRIGHT RED, because of the oxygenated iron-containing hemoglobin found in the red blood cells. Deoxygenated blood is a darker shade of red, which can be seen during blood donation and when venous blood samples are taken.

However, due to skin pigments, blood vessel coverings and an optical effect caused by the way in which light penetrates through the skin, veins typically appear blue in color. This has led to a common misconception that venous blood is blue before it is exposed to air. Another reason for this misconception is that medical charts always show venous blood as blue in order to distinguish it from arterial blood which is depicted as red on the same chart. The skin itself can also get a bluish coloration when blood flow is reduced, such as in cold conditions; this is given the name cyanosis.

Source: Wikipedia

Are we done? How can anyone debate about something where there is no issue to really "debate" about.

I only saw blue blood on films

someone do show me a pic

~Lil JinX~ said:
Oxygenated blood is actually BRIGHT RED, because of the oxygenated iron-containing hemoglobin found in the red blood cells. Deoxygenated blood is a darker shade of red, which can be seen during blood donation and when venous blood samples are taken.

However, due to skin pigments, blood vessel coverings and an optical effect caused by the way in which light penetrates through the skin, veins typically appear blue in color. This has led to a common misconception that venous blood is blue before it is exposed to air. Another reason for this misconception is that medical charts always show venous blood as blue in order to distinguish it from arterial blood which is depicted as red on the same chart. The skin itself can also get a bluish coloration when blood flow is reduced, such as in cold conditions; this is given the name cyanosis.

Source: Wikipedia

Are we done? How can anyone debate about something where there is no issue to really "debate" about.

yeah,i knew some one would post this answer sooner or later.
a typical internet browsed answer.
every other person also thinks the same.
actually many places i have reed de-oxy Hb to be bluish/purple and hence.
many people say what you have written.
its not that its like what majority says.
and regarding that blood donation thing,when you donate blood,there is air present in the collecting tube and bottle/bag.

so...?

While mammalian blood is never blue, there is a rare condition (sulfhemoglobinemia) that results in green blood. Skinks in the genus Prasinohaema have green blood due to a buildup of the waste product biliverdin.

That should explain things further, a bit? I didn't get the second part of your query.

yeah,i knew some one would post this answer sooner or later.
a typical internet browsed answer.
every other person also thinks the same.

What the heck is the internet for then, dude?

Wikipedia is the fastest way to an answer, although I admit it isn't the most accurate. It usually suffices in 75% of cases though.

~Lil JinX~ said:
That should explain things further, a bit? I didn't get the second part of your query.

i meant while donating blood,there are not proper vacuum conditions.air is always present.so it "can" get red when in contact with air

Blood is red because that's what we see when we cut ourselves. It doesn't matter what it looks under the microscope. See what bood looks like under microscope.

*images.google.com/images?hl=en&cli...5p&q=blood+under+microscope+&um=1&sa=N&tab=wi

A

+1

blackpearl said:
Blood is red because that's what we see when we cut ourselves. It doesn't matter what it looks under the microscope. See what bood looks like under microscope.

*images.google.com/images?hl=en&client=opera&rls=en&hs=Y5p&q=blood+under+microscope+&um=1&sa=N&tab=wi

who said anything about the blood you are reffering to?
i said for venous blood.
that blood whch you mentioned is of course red

First of all,hemoglobin can't turn blue!!!! :lol:

Human blood is red, ranging from bright red when oxygenated to dark red when not. It owes its colour to hemoglobin, a metalloprotein compound containing iron in the form of heme, to which oxygen binds. There exists a popular misconception that deoxygenated blood is blue and that blood only becomes red when it comes into contact with oxygen. Blood is never blue, but veins appear blue because light is diffused by skin. Moreover, the blood inside is dark red and exhibits poor light reflection. From a physiological perspective, veins and arteries appear similar when skin is removed and are seen directly.

till date blood is red

mayanks_098 said:
who said anything about the blood you are reffering to?
i said for venous blood.
that blood whch you mentioned is of course red

You see the same red blood, whether it's from the arteries or the vein, just different shades.

Like Tech Genius explained, non oxygenated blood is dark red whereas oxygeneted blood is bright red. The veins with the dark red blood appears blue because lack of transperancy of the blood and the way light is absorbed by the skin. Arteries on the otherhand are embedded deeper in the skin and cannot be seen from outside. If you were able to see arteries from outside the skin they would have appeared blue too.

I don't know from where these people come up with such weird theories?

PS. By the way, when you cut yourselves its often the venous blood not artery blood, beacause like I said vein are closer to the skin and the first thing that a blade encounters when you cut it. When you donate blood or give blood smaples for medical testing, they plunge the needle into your vein not the artery.

blackpearl said:
You see the same red blood, whether it's from the arteries or the vein, just different shades.

Like Tech Genius explained, non oxygenated blood is dark red whereas oxygeneted blood is bright red. The veins with the dark red blood appears blue because lack of transperancy of the blood and the way light is absorbed by the skin. Arteries on the otherhand are embedded deeper in the skin and cannot be seen from outside. If you were able to see arteries from outside the skin they would have appeared blue too.

I don't know from where these people come up with such weird theories?

PS. By the way, when you cut yourselves its often the venous blood not artery blood, beacause like I said vein are closer to the skin and the first thing that a blade encounters when you cut it. When you donate blood or give blood smaples for medical testing, they plunge the needle into your vein not the artery.

what point are you making bro.
see,i havent done any personal experiment neither have you.what you are saying is what you generally read on internet and books.and many times they are proved wrong.even well established facts are sometimes proven wrong.there was a time when no one believed that landing on moon is possible,they said its foolish but it happened.so you never know.
i just want correct answer.im also searching for it
or tell me if you have done a experiment on it.
and when you cut your skin your veins bleed fine,but that blood comes in contact with air(& hence o2) and regains its red color.

what you are saying is conventional theory.

what im saying is out of these facts.i want the correct answer not that ki we know its red so its red.

ok tell me,when oxygen supply is less/restricted in a part of body due to any accidnt or something.why does that part appear blue?

and when you die why do your lips turn blue if they are already red?thats because oxygen content gets reduced in blood and hence it becomes blue.thats what i think.
you say
any answer?

whoa I'am getting sick at the discussion of BLOOD...feeling giddy....think it looks and feels good when inside...when outside the body...I feel like I'll throw up...
now jokes apart...I was of the notion that blood was of blackish red in color

BAD BLOOD IS BLUE.I think even deoxygenated blood is not perfectly blue,as a matter of fact it is more red than blue.

BLUE is the colour of our veins not blood.

Yes, certain body parts can turn blue from a lack of oxygen. People's lips sometimes turns blue because when the light is diffused by skin, the veins appear blue.Look up cyanosis for a better answer.The blue color appears when veins are seen through the skin. The color of the vein wall itself, contrast, and translucency are what give the appearance of blue.

It is a widely repeated error, one that has even shown up in university instruction. Deoxygenated blood is a dark and unmistakable shade of red.

The entire iron complex (the iron center, the phorphyrin, the imidazole of a histidine residue, and oxygen if present) is responsible for the red color, and shifts in the geometry around the metal center affects just what the color is. When there's no oxygen bound the iron center has a distorted tetrahedral pyramidal geometry, with the iron sitting a bit off of the plane of the porphyrin. Once oxygen binds, however, the iron adopts an octahedral geometry, and sits directly in the plane of the porphyrine (it's probably how close to the plane of the porphyrin the iron is that has the biggest effect on the color, as even small changes in the electronics of the porphyrin, a massive chromophore, could create shifts in color; but this is just conjecture on my part). Carbon monoxide binding to the iron center has the exact same effect, but as CO has a much higher binding affinity for iron that oxygen a greater percentage of the hemoglobin becomes bound, resulting in the even brighter color.

As a side note, porphyrins not bound to a metal are often a dark purple or green to black color (and are an absolute pain in the ass to work with), so that may explain why the color of the heme complex becomes darker as the iron moves out of the plane of the porphyrin.

Tech Genius said:
Yes, certain body parts can turn blue from a lack of oxygen. People's lips sometimes turns blue because when the light is diffused by skin, the veins appear blue.Look up cyanosis for a better answer.The blue color appears when veins are seen through the skin. The color of the vein wall itself, contrast, and translucency are what give the appearance of blue.

It is a widely repeated error, one that has even shown up in university instruction. Deoxygenated blood is a dark and unmistakable shade of red.

The entire iron complex (the iron center, the phorphyrin, the imidazole of a histidine residue, and oxygen if present) is responsible for the red color, and shifts in the geometry around the metal center affects just what the color is. When there's no oxygen bound the iron center has a distorted tetrahedral pyramidal geometry, with the iron sitting a bit off of the plane of the porphyrin. Once oxygen binds, however, the iron adopts an octahedral geometry, and sits directly in the plane of the porphyrine (it's probably how close to the plane of the porphyrin the iron is that has the biggest effect on the color, as even small changes in the electronics of the porphyrin, a massive chromophore, could create shifts in color; but this is just conjecture on my part). Carbon monoxide binding to the iron center has the exact same effect, but as CO has a much higher binding affinity for iron that oxygen a greater percentage of the hemoglobin becomes bound, resulting in the even brighter color.

As a side note, porphyrins not bound to a metal are often a dark purple or green to black color (and are an absolute pain in the ass to work with), so that may explain why the color of the heme complex becomes darker as the iron moves out of the plane of the porphyrin.

WOW man you know french,that's incredible.I mean seriously where did you find all this s***.

PLEASE spare us from the deatils.

The_Devil_Himself said:
WOW man you know french,that's incredible.I mean seriously where did you find all this s***.

PLEASE spare us from the deatils.

I wrote.

Tech Genius said:
Yes, certain body parts can turn blue from a lack of oxygen. People's lips sometimes turns blue because when the light is diffused by skin, the veins appear blue.Look up cyanosis for a better answer.The blue color appears when veins are seen through the skin. The color of the vein wall itself, contrast, and translucency are what give the appearance of blue.

It is a widely repeated error, one that has even shown up in university instruction. Deoxygenated blood is a dark and unmistakable shade of red.

The entire iron complex (the iron center, the phorphyrin, the imidazole of a histidine residue, and oxygen if present) is responsible for the red color, and shifts in the geometry around the metal center affects just what the color is. When there's no oxygen bound the iron center has a distorted tetrahedral pyramidal geometry, with the iron sitting a bit off of the plane of the porphyrin. Once oxygen binds, however, the iron adopts an octahedral geometry, and sits directly in the plane of the porphyrine (it's probably how close to the plane of the porphyrin the iron is that has the biggest effect on the color, as even small changes in the electronics of the porphyrin, a massive chromophore, could create shifts in color; but this is just conjecture on my part). Carbon monoxide binding to the iron center has the exact same effect, but as CO has a much higher binding affinity for iron that oxygen a greater percentage of the hemoglobin becomes bound, resulting in the even brighter color.

As a side note, porphyrins not bound to a metal are often a dark purple or green to black color (and are an absolute pain in the ass to work with), so that may explain why the color of the heme complex becomes darker as the iron moves out of the plane of the porphyrin.

brilliant answer. i was looking for some good answer as this.

see i agree,but what im saying is that these are all theoritical things,this is what we read and know.

you are not getting me.
im NOT CLAIMING that venous blood is blue.any personal practical experiment?or you know anyone who researched on this topic?
im asking that apart from text book knowledge,does any body know more on this.
cause these things have weight.
no really,im a bio student(ug) and to me its intriguing

have you done any practical experiment on this dude?

P.S. what are you doing btw,i mean studies.

mayanks_098 said:
brilliant answer. i was looking for some good answer as this.

see i agree,but what im saying is that these are all theoritical things,this is what we read and know.

you are not getting me.
im NOT CLAIMING that venous blood is blue.
im asking that apart from text book knowledge,does any body know more on this.
cause these things have weight.
no really,im a bio student(ug) and to me its intriguing

have you done any practical experiment on this dude?

P.S. what are you doing btw,i mean studies.

Nope,my teacher told me.Shortly,we have to do all the blood work :twisted:

.If i ask the same question in my university,they will throw me out.Doing B.tech in biotech.

oh man...
tabhi only we two are fighting over it
me also doing biotech
btech/mtech dual degree in biotech from jaypee,2nd year

you?

but i will surely ask.im searching on this and as soon as i get soome good matter ill consult them.
infact i already asked one lecturer in 1st sem but she said...no its red color only.

N

the only diff between venous blood and arterial blood is the degree of redness and darkness...

venous blood is very dark, almost as if sm blue pigment has been added to arterial blood, which is lil lighter in colour. I've seen both samples at school.

Nav11aug said:
the only diff between venous blood and arterial blood is the degree of redness and darkness...

venous blood is very dark, almost as if sm blue pigment has been added to arterial blood, which is lil lighter in colour. I've seen both samples at school.

you cant normally see venous blood coz if its in contact with oxygen it has become arterial blood from venous

N

wht the heck... is it .. imposs

^^ what i meant was that venous blood is deoxygenated form of arterial blood.

and thats oly inside the body.
once you get it out,it is mixed with oxygen and becomes oxygenated(arterial)

N

phew.. u sounded like... ill take venous blood and expose it to air... it takes on O2 ..omg

hey who moved this and why?

i think this was better suited for fight club.

N

loll

Bump

Its Red..dunno bout the rest !

N

Bump