In humans and other hemoglobin-using creatures, oxygenated blood is bright red. This is due to oxygenated iron 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 an optical effect caused by the way in which light penetrates through the skin, veins typically appear blue in colour. 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.
2007-03-26 13:19:11
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answer #1
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answered by Anonymous
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OMG - just LOOK at the preceding answers.
Blood is RED, guys. Veins may look blue, but the blood inside them is RED. When the oxygen content is VERY low the colour of the blood is very dark - almost appears black.
Take blood out of a blue looking vein using a vacuum arrangement and it is still red.
Furthermore, venous blood DOES contain some oxygen. When you do a blood gas test on venous blood there is a measureable partial pressure of oxygen remaining.
2007-03-26 13:18:51
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answer #2
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answered by Orinoco 7
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Blood has 4 substantial factors: Platelets (crimson, smaller) much less considerable, approximately 13% complete TBV White Blood Cells (Leukocytes) clean yet would look white in communities - incorporate aprx 3% TBV crimson Blood Cells (erythrocytes) incorporate approximately fifty 5% of TBV Blood is crimson, in various colorings. incredibly oxygenated blood is vivid crimson, very very nearly luminescent in nature, usually coming direct from the lungs after a huge inhalation of oxygen via the host physique. Depleted blood that has little or no hemoglobin left and is often en course back to the midsection for refreshments is dark crimson and viscous. in case you want to appreciate what coloration 'lifeless ' blood cells are, ask A coroner, I even have not been able to finding that tid-little bit of information. An remoted crimson blood cellular without hemoglobin nevertheless is crimson, yet an particularly dark crimson. end - any mammalian crature containing hemoglobin dependant blood has crimson blood. that's crimson. besides the shown fact that---- there's a fish, the Antarctic Ice Fish, that has NO HEMOGLOBIN! no kidding. It dissolves this is oxygen directly into its tissues and consequently has blue blood. tell that to the country golf equipment of Europe! A blue blood, quite! LOL
2016-11-23 17:53:08
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answer #3
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answered by viney 4
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Human blood is red in the veins and redder in the arteries (pulmonary veins and arteries being the exception, and then just turn it backward). Have you ever had blood drawn for a blood test? That blood comes from your vein and it does not have any contact with the air. It's red. You can see it in the syringe. Have you given blood at a blood bank? The blood goes directly from your vein into the collection bag without contacting the air. It's red.
2007-03-26 13:21:51
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answer #4
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answered by ecolink 7
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It is blue before it hits the air, and red, when it is exposed to the air. When you spin the blood to separate it so you get plasma, some of it is clear, and some of it is a deep dark red. The blood also separates by itself when you die and you will see that part of it appears to be clear like water and the other is plasma. Your blood does carry some oxygen with it throught the veins, but not to the degree of when it is exposed to the air.
2007-03-26 13:17:23
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answer #5
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answered by gigi 5
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It is true what they say, your blood is blue before combined with oxygen. Blood is not mixed with oxygen in your veins, the air bubbles would kill you if that were the case. This is also why they tap the bubbles out of an injection, as well as squirt some out of the needle before giving you a shot.
2007-03-26 13:16:42
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answer #6
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answered by Anonymous
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It is blue before it is exposed to oxygen but turns red when such exposure occurs.
2007-03-26 13:13:41
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answer #7
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answered by Anonymous
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