The blood in your veins lacks oxygen. Thats why its blue. Or actually, purple. Once its oxygenated, it becomes red.
Okay well, what everyone else said! LOL. You had no answers when I read your question. Sry to be redundant.
The poster below claims that your blood is NEVER blue. That is true to a point. But there is what is known as cyanosis which is the bluish effect the skin takes on due to lack of oxygen. This is a reflection of light through the skin that makes the purple blood take on a bluish hue.
2007-01-18 14:47:54
·
answer #1
·
answered by carolinapnthrgirl 1
·
1⤊
1⤋
I agree the most with p_not the most.
The blood is always red.
It's the vessles themselves that are blue
I would like to point out though that the pulmonary vein is the only vein in the body that does carry oxygen rich blood. (lungs>heart)
All the other veins are returning to the lungs depleted of O2 so it;s an oddity to mention that specific vein.
further
carolinap,
mentioned a symptom of cyanosis is hypoxia or lack of O2 or coldness which can be seen as a blueness of the skin, perhaps this is from lack of O2, but i don't agree that it specifically affects the actual colour of the blood much but rather a sign of restricted or impeded flow to the cells of the skin.
I reason this because cyanide poisoning in itself causes acidosis because it interferes with the iron in the blood from enabling the erthrocytes or RED blood cells utylizing oxygen. Keeping the iron from working by combining with it causes the cell to become anaerobic rather than aerobic as it normally is, which means instead of using oxygen the cell has none and processes by fermentation and CO2 instead, thus depleting the blood completely of oxygen.
In cases of cyanide poisoning guess what colour the blood is...
Bright Red, even brighter than oxygen rich blood by comparison, much brighter.
But the air does turn it darker, just look on the sidewalks near the bars.
Ob1 shaman
2007-01-19 00:08:56
·
answer #2
·
answered by old_brain 5
·
0⤊
0⤋
blood does not ever and i repeat EVER turn blue. true it is bright red when oxygenated, it turns a dark red when it gives up the oxygen... the reason it looks blue is because the veins that contain it contain a blue colored conective tissue that covers the muscles, fat, and so on which is contained in the vein. to further emphasize this point the pulminary arteries are blue while the pulminary veins are red. the pulminary arteries go from the heart to the lungs to pick up oxygen and then they veins which now contain oxygenated blood go from the lungs to the heart to be distributed to the rest of the body
2007-01-18 22:47:41
·
answer #3
·
answered by Anonymous
·
2⤊
0⤋
Your blood is red and always will be. It is a dull red while in the circulatory system and turns bright red when exposed to the air because blood has hemoglobin that bond to oxygen. It may appear blue when you look at your veins because of various skin pigmentations, and you are also seeing it through layers of muscle/fat tissues which change the appearance.
2007-01-18 22:48:44
·
answer #4
·
answered by Anonymous
·
0⤊
1⤋
Your Blood is Blue up until its hits oxygen, Like out of a cut. But that is why your veins are blue
2007-01-18 22:44:26
·
answer #5
·
answered by Jason C 1
·
0⤊
2⤋
Blood is always red, this is due to haemoglobin in the red blood cells. However the haemoglobin take on a darker bluish tinge when it has been depleted of oxygen. Our skin colour is due to many factors like melanin (colour of your skin), and blood flow under the surface. Since most of the blood is a brighter red colour (not that I am saying that it is in anyway bright to begin with) the de-oxygenated blood looks blue through our skin. Hope this helps.
2007-01-18 22:47:10
·
answer #6
·
answered by Arthur N 4
·
0⤊
1⤋
My blood is red and as far as i know every ones is. It is blue inside your veins because the oxygen hasn't gotten to it yet.
2007-01-18 22:50:43
·
answer #7
·
answered by Anonymous
·
0⤊
1⤋
What you are seeing is oxygen rich blood being carried in the arteries. The blood that comes out when you cut yourself is much darker being oxygen depleted in the veins. Though arterial blood will be red once it is spilled.
2007-01-18 22:49:02
·
answer #8
·
answered by Brian G 2
·
0⤊
0⤋
blood is a deeper red on it's way back to the heart. The oxygen it gets from the heart makes it red. The bluish colour we see on our skin is this blood but also the vein itself.
2007-01-18 22:43:54
·
answer #9
·
answered by Scotjay 2
·
0⤊
2⤋
The color of the vien is showing and not the blood inside. That's what I think.
2007-01-18 22:42:39
·
answer #10
·
answered by Rawr 2
·
0⤊
1⤋