2007-03-13 21:29:31 · 10 answers · asked by bathkhush 1 in Science & Mathematics ➔ Medicine
blood is always red. when it's well oxygenated, it's bright red. but when it's not oxygenated, it turns a darker red. it will never be blue, even if you're in a vaccum with no oxygen at all.
2007-03-14 05:38:11 · answer #1 · answered by belfus 6 · 2⤊ 0⤋
Blood is red. Bright red if well oxygenated, dark red if poorly oxygenated. Never, ever blue. Even in dead people, it's just a really dark red/purple. But not blue.
Your veins look blue because the tissue overlying the blood (vein wall and skin) bend the light like the atmosphere bends light to make the sky look blue.
I have a podcast addressing this issue coming out, but not for another few days.
http://www.medicalminutepodcast.com/?p=27
(If the link doesn't work yet, it will next Tuesday.)
Octopi have bluish blood, because instead of hemoglobin, they use hemocyanin to carry oxygen, and that looks a bit blue.
2007-03-14 10:57:10 · answer #2 · answered by Pangolin 7 · 1⤊ 0⤋
Personally, I think that's an 'old wives tale'. Think, the inside of your mouth is 'pink', not light blue. Have you never seen any footage of, for instance, of a colon exam? It's pink. If what you're saying is true, shouldn't it be light blue?
Research the color of blood. Besides, blood is oxygen enriched now I think of it. It carries oxygen to all the body parts. So 'I' think it's red before it contacts 'outside' air.
2007-03-13 21:47:16 · answer #3 · answered by Mack 5 · 0⤊ 0⤋
It depends on how you define vacuum. Vacuum has absolutely nothing in it and atm pressure is zero. If you bring in a blood vessel, it also contains some air dissolved in blood.
Anyways, the red colour of blood is not due to air. When light gets incidented on haemoglobin molecules, red light is reflected - and that makes the blood red !
2007-03-13 21:39:56 · answer #4 · answered by Ankit 2 · 2⤊ 0⤋
Blood is never any color but red. oxygenated blod is bright red deoxy blood is dark red. It appears green/blue due to the refractive index of our skin
2007-03-13 21:44:27 · answer #5 · answered by beano007 2 · 4⤊ 0⤋
well, the blood cells would burst, but stay blue/purpleish. If no oxygen hits the blood, it will not change color.
2007-03-13 21:34:24 · answer #6 · answered by Tom B 4 · 0⤊ 2⤋
All of the air rushes out of the hose and we lose our suction.
2007-03-13 21:53:27 · answer #7 · answered by DixeVil 5 · 0⤊ 1⤋
You would have purple blood i guess but you'd be more worried about dying by then.
2007-03-13 21:35:03 · answer #8 · answered by Anonymous · 0⤊ 2⤋
that would be dam near impossible haha
2007-03-13 22:47:25 · answer #9 · answered by kasee_715 1 · 0⤊ 1⤋
Your blood remains blue.
2007-03-13 21:34:59 · answer #10 · answered by Anonymous · 0⤊ 2⤋