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Blood is always red, never blue.

Human Anatomy, Physiology, and Medicine. Anything human!

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What color is deoxygenated blood?

Poll ended at Fri Apr 29, 2005 5:05 am

Red
4
80%
Blue
1
20%
 
Total votes : 5

Postby MrMistery » Sat Aug 19, 2006 5:50 pm

Exactly the kind of thing that makes up a modern mith. The experiments were done by a doctor something in 1907 and never repeated. Please don't get me mad if i say that is totally ignore that.
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
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Postby fireblaze » Tue Aug 22, 2006 12:24 am

i just want to luagh it is obviuos that deoxygenated blood is not blue
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Re: Deoxygenated Blood is Blue!

Postby LilKim » Tue Aug 22, 2006 3:16 pm

Bellion wrote:I done a 4- year course in PE including anatomical studies and my father is a doctor and i guarantee deoxygenated blood is Blue!


you should post your Fathers name on here... so that i'll know to never go to him if I get sick!
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Re: Deoxygenated Blood is Blue!

Postby LilKim » Tue Aug 22, 2006 3:21 pm

LilKim wrote:
Bellion wrote:I done a 4- year course in PE including anatomical studies and my father is a doctor and i guarantee deoxygenated blood is Blue!


you should post your Fathers name on here... so that i'll know to never go to him if I get sick!


ok... ok!.. i was kidding! don't post your dad's name on the internet... that wouldn't be safe for you or your father..
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Postby Dustfinger » Tue Aug 22, 2006 8:10 pm

:lol: lilkim....this thread is just funny. And there still seem to be people who believe blood can be blue...
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Postby weesper » Wed Aug 23, 2006 6:00 am

kiekyon wrote: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.


Exactly this is the answer, it doesnt turn Smurf blue it just gets a more purplish tint to it than fully oxygenated bright red arterial blood. So yes in a way venous blood is blue-er than arterial blood. Note that you'll need to draw arterial blood before you can appreciate this difference and most samples drawn are of course venous, so if you've just taken routine venous samples and not done series of arterial blood gas measurements you wont have seen the colour difference.
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Reply is here........

Postby Ragavendra samy » Tue Aug 29, 2006 7:24 am

James wrote:So why do our lips turn blue when we die?

Not all the bodies become blue after death but it is based only on the oxygen supply to the cells/tissues when alive.... :D :wink:
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Re: Deoxygenated Blood is Blue!

Postby mayanks_098 » Thu Aug 23, 2007 11:56 am

Bellion wrote:I done a 4- year course in PE including anatomical studies and my father is a doctor and i guarantee deoxygenated blood is Blue!



can you give me a a proper proof.
even i agree with you but no one believes.
i need a good proof.
half of links on net say its blue half say its dark red.
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Postby mayanks_098 » Thu Aug 23, 2007 11:58 am

Bellion wrote: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


bulls eye.
thats the exact explanation
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Postby mayanks_098 » Thu Aug 23, 2007 12:07 pm

weesper wrote:
kiekyon wrote: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.


Exactly this is the answer, it doesnt turn Smurf blue it just gets a more purplish tint to it than fully oxygenated bright red arterial blood. So yes in a way venous blood is blue-er than arterial blood. Note that you'll need to draw arterial blood before you can appreciate this difference and most samples drawn are of course venous, so if you've just taken routine venous samples and not done series of arterial blood gas measurements you wont have seen the colour difference.



another good answer
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Blood is red.

Postby rlj » Thu Sep 06, 2007 9:34 pm

Bellion wrote: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


Wow, I can't believe how many people believe blood is blue.

Blood is RED. Arterial blood is bright red. Venous blood is dark red. The color of blood is derived from its hemoglobin. Hemoglobin is red, either oxygenated or deoxygenated.

Veins are sometimes depicted in blue color in anatomy diagrams to make it easy to pick them out from the arteries. This often leads to the erroneous conclusion that venous blood is blue. Not true.

Another reason people think doxygenated or venous blood is blue is that veins can sometimes appear blue under the skin. Normal veins are actually mostly white or cream in color. The reason that veins observed through the skin and underlying soft tissue sometimes appear blue is that the skin and tissues preferentially absorb red light and mostly blue light is reflected back from the vein. Black lesions deep under the skin also will appear blue for the same reason, hence the term “Blue Nevus” for a mole that is located deep in the skin. Is the lightbulb inside of your brake light on your car red? Probably not, it's white, it just has a red lens (filter) over it. What you’re actually seeing is the surface of the vein and not the blood inside. The walls of veins are opaque, you cannot see through the wall and therefore you cannot see the blood inside of them. Capillaries are thin enough to see through. Hold your hand up and shine a flashlight through it from the other side and you will see red. That is capillary blood you are observing. It's red folks. If you see blue when you do this, your a crustacean.

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Postby genovese » Wed Oct 03, 2007 7:53 pm

What is the total weight of the bodies oxygenated blood and what is the total weight of the bodies deoxygenated blood?

When a person dies, could the 21 gms be the difference?javascript:emoticon(':D')
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