Well to be told that blood was blue was a shock to say the least but then my logic kicked in, and I argued the point. He then proceeded to go onto the Internet to prove his point. I was then presented with more clap trap on the Internet, thankfully some logical and normal people had also written on these sites.
Here is my argument:
- The heart circulates blood which is oxygenated by the lungs. Therefore to claim blood is blue until it is exposed to oxygen is incorrect.
- When blood is taken by a nurse, the equipment has to be completely air free, or else air would enter the blood vessels, with fatal consequences to the patient.
- Some people state that blood is blue as that's why our vessels I our wrist are blue. Our vessels in our wrist are blood due to pigment in the vessel. Some people have blue vessels and some have green- does that mean they have green blood? The pigment in these vessels are also linked to our ability to tan, those with green tan better than those with blue.
I know most of his information as I used to study crime scene science and I saw plenty of blood. I also did degree level biology and also went to the morgue to look study bodies.
If anyone thinks that blood is blue then please tell me why as I cant understand how in the world this is so.
Thanks all and I hope you enjoy this post.
19 comments:
I guess it depends on whether you're royal or not..
Mine is red unless I'm colour blind.
CJ xx
Its seems the logical members of the nation all have this colour blindness! lol
Merlins Wizard
xxx
Er, hmm, er - ! This is one of those awkward questions isn't it. I don't know the answer. But I do have green veins!
Cyanosis is a blue coloration of the skin and mucous membranes due to the presence of deoxygenated hemoglobin in blood vessels near the skin surface. It occurs when the oxygen saturation of arterial blood falls below 85-90% (1.5g/dl deoxyhemoglobin).
Although human blood is always a shade of red (except in rare cases of hemoglobin-related disease), the optical properties of skin distort the dark red color of deoxygenated blood to make it appear blueish[1].
The elementary principle behind cyanosis is that deoxygenated hemoglobin is more prone to the optical bluish discoloration, and also produces vasoconstriction that makes it more evident. The scattering of color that produces the blue hue of veins and cyanosis is similar to the process that makes the sky and large bodies of water appear blue: some colors are refracted and absorbed more than others. During cyanosis, tissues are uncharacteristically low on oxygen, and therefore tissues that would normally be filled with bright oxygenated blood are instead filled with darker, deoxygenated blood. Darker blood is much more prone to the blue-shifting optical effects[2], and thus oxygen deficiency - hypoxia - leads to blue discoloration of the lips and other mucous membranes.
Like people say 'never believe wot you read in the papers'
Trust me to believe! hahaha
Darkman Uk! My god! well at least I proved you wrong on something for once! lol. Thanks for the massive comment, I think I shall post it as a blog on its own! lol
Merlins Wizard
xxx
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