Sunday, October 25, 2009

What color is blood in our arteries and veins?

From Wikipedia: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 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.
blood leading away from our lungs are blue due to be oxygenated, blood leading back to the heart is red.
It's red, close your eyes and look towards a light...what do you see, open your mouth and look's pink, blood gives it that color. without out blood our tissue would be pale and definitely is not blue, hope this helps you :)
blue, in both directions. the age old myth that it is red on one direction and blue coming back is totally a farce. It only turns red when exposed to atmospheric oxygen. Just look at the femoral artery running up your inner is easiest to see near your crotch...its BLUE...that is an artery...according to legend, its supposed to have RED blood in it....are artery tissues red and veins blue? NO! They are fleshy pink and translucent under pressure, that is why you can see them colored...the blood is BLUE
All blood is red, just different shades. The blue myth is caused by diagrams in which it is blue to show the two different systems.
Blood is red in any blood vessel. The arteries carry oxygen rich blood so it is a brighter red. The veins carry oxygen poor blood and it is a darker red color. The veins that you see through your skin only appear blue due to the reflection of the light. All blood is red due to the iron element in the hemoglobin. BLUE BLOOD IS A MYTH!
In humans, all blood is red. It can be different shades of red depending on the oxygenation of the hemoglobin molecules in the red blood cells.Our veins look blue because the tissue overlying them bends light, just like the atmosphere bends light to make the sky look blue.I did a podcast about this topic: click on the Play Now link - it's about a minute long.Hope that clears up your question.(Factoid: Octopus blood is bluish because instead of hemoglobin, they use hemocyanin, a copper based molecule.)

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