Why? Tell Me Why!: Blood

[mrgfunkyman]

Oh god, no, no not even close. Blood is never blue, only shades of red. Deoxygenated blood is dark red, oxygenated blood is bright red. The reason your veins look blue is because of Rayleigh scattering--look it up. If you were to cut your arm open right now and look at the veins that appeared blue through the skin, you would see that they are actually red.

Here is a very helpful article on the matter.

[mrgfunkyman]

@mrgfunkyman

Oops, forgot that youtube blocks links.

scienceblogs (dot) com/scientificactivist/2008/04­/why_are_veins_blue.php

[ghuegel]

No, this video has it wrong. Most people think that de-oxygenated blood is blue, but it's *not*. Oxygenated blood is bright red, and de-oxygenated blood is dark red. The Wikipedia article on "Blood" has it right - read the section titled "Color".

Veins appear blue mostly for reasons other than the dark-red color of the blood in them.

[diah4]

WOW. That makes alot of sense. amazing. The human body is amazing.

[IXxR3C0NxXI]

the blood in the veins are actually clear it just looks blue

[diah4]

How you know that?

[IXxR3C0NxXI]

@diah4 health class

[samuelkim1]

lol this person never drew blood before

[tjhospo]

LOL deoxygenated blood beeing blue how is she working in a hospital all blood in human body is red lol retards

[Gezab]

Hoho wow.

I really wouldn't trust that dumbass woman to work at a hospital.

[DigitizedSelf]

Perhaps, but it's also wrong (much like your way of spelling knowledge)

[DigitizedSelf]

As many has already said blood is never blue... deoxygenated blood is dark red and NOT blue. Rather it is due to the absorption of low frequency light in the subcutaneous fat which allow only blue light to penetrate through the vein and scatter off.

To have a vascular surgeon say that blood is blue is pretty embarrassing - or as we say on teh intarweb: Epic fail.

[NukeGtv]

sir that was a very true and accurate statement honestly I wouldn't have picked up on that. Thanks.

[JJAB91]

NO DEOXYGENATED BLOOD IS NOT BLUE! Its actually merely a darker red, veins appear blue because you are viewing them through skin when light travels through your skin the color of the light itself that reaches your eyes changes. The vein itself is not blue but what you see is.

[DigitizedSelf]

I knew it! I've got blue blood ^.^

[cristoretornebiblia]

This is common knowledge, also add the skin colour on a pale skin would be more "blue", as my girlfriend is white and she is red and blue, when I finish pounding her I notice her red vigina, the skin on some areas on the body is more fragile therefore the blood can be more visible

[Erkerkerk123]

The host makes the doctor look like a dwarf

[pdgftwa]

@Erkerkerk123 lol

[vineethkuruvath]

wrong answer

[RoseWarda1]

Not a straightforward answer :( she went into explaining how that vascular system works but, not how actually they get the color chemically speaking.

[arkim101]

@RoseWarda1

The protein hemoglobin, which carries oxygen in the blood, changes shape when

it binds oxygen. When it changes shape, it absorbs different wavelengths of light,

making it change color.

[kryptondude1]

@dannooll

rust is red as the iron is oxidised, electrons in the highest occupied molecular orbital (HOMO) are lost and d-d transitions are possible and the spin of the electrons allow this transition... d-d transitionsis obvious as the red is dull, meaning low absorption intensity.

The bright red hue of haemoglobins indicates high intensity absorption of radiation at the 700nm end of the visible spectrum. LMCT- ligand metal charge transfer.

So... red NOT for the same reason.

[killeroreo214]

I learned blood has 4 things in it

1.Red Blood Cells that has hemoglobin that carries O2

2.White Blood Cells that fight infection

3.Platelets thAt clot the blood when there is a cut 2 prevent too much blood loss

4.Plasma which is most of the blood and is mostly water

[USAconstitut1on]

this isnt even true correct answer:Blood that contains hemoglobin (such as in humans and other vetebrates) is always red Some of you may say well the veins are blue that the blood is in. Well blood is a very dark dark red the reason the veins appears to be blue is because the light hits our skin and refracts of hemoglobin filled cells that are attached to co2

[tresica]

why does everyone think the know everthing are you a hematologist or even a general doctor? If not shut up and learn something

[killeroreo214]

blood that is in the veins is blue because it is low in oxygen all veins r blue, only 1 artery is blue because it goes away from the heart to the lungs, but the veins are blue and goes 2 the heart to be sent 2 the lungs to carry oxygen

[13stAndreas]

Okay so, it is the hemoglobin protein that contains 4 heme-groups that has a central Fe+2 ion, which binds the oxygen and this is why the blood is red. Why the veins appear blueish is because first of all the ones we notice being blue travels very superficially just below the skin, they have very thin walls (low elastic fiber count in tunica media) and by having deoxygenated heme the attenuation of light (scattering & absorption) affects photons of different wavelenght which we percieve as blue.

[13stAndreas]

Btw heme binds CO2 with much lower affinity then O2, it solves more in the plasma and acts as a part of our blood buffer system.

[killeroreo214]

Right, sure

i understood what u said

[tsenkai]

this is new for someone?

[super1commenter]

So they are saying that deoxygenated blood is blue??? 0.0

[EmceeGlitch]

Why the fuck did they even do this? This is common-day knowledge!

[super1commenter]

I know that, but guess what? My science teachers doesn't know that!

[pashaahsj]

yellow-blood, blood with awesome xP

[pashaahsj]

nice test at the end lol

"so when i blah blah blah... this happens because .. ?"

lol

[PirateXzibit]

Blue-blood, blood lacking oxygen.

Red-blood, blood with oxygen.

Sparkling fags, aka Edward, only drinks blood from animals, cuz he's a vegetarian.

[jimmy41607]

SO YOU ARE SAYING OXYGEN IS RED? XD JK

[BreakfastProductions]

Omgg. This video makes me feel so uncomfortable!

[Gooshnads]

this information isnt really that hard.... just take basic science classes and actually LISTEN... they teach this in grade 6 or so... or 8.. i forget but i think 8 would be too late haha

or if you REALLY dont know.... and it's past that time... just take exercise science lol

[shaolindreams]

mmmm blood

[sarkerm2]

discovery network needs to find something better to do

[deadlyglitch]

anyone else thirsty?

[ummhea]

Today's kids have a television schedule of

Disney Channel, Nick, then Cartoon network. Repeat... 10x, then sleep. Repeat again.

This is going from common knowledge.... to uncommon knowledge

[Gooshnads]

LOL the worst of which is disney channel... my 10 year old sister drives me insane... >.>

[ummhea]

@Gooshnads i have a tween sis too.

Its pain man.

[Gooshnads]

she even has her own computer since grade 3.... i go wtf to my parents at times

[ummhea]

@Gooshnads Lol the stuff i get (ipod, comp, etc) I get like 10 yrs later than my sis lol

[animalfreak147]

blood never turns blue...

[leinadw91]

I thought this was common knowledge. I guess not.

[DigitizedSelf]

It might be common knowledge but it's WRONG - check out the many excellent explanations why ;-)

[vietguy808]

@leinadw91

ya right...i knew this also

[jgordon707]

common knowledge.

[parkerpnut]

@tinyauk I agree :P But if a 30 year old asked that even though he/she should know that.. He/She would of been like 20 when the Magic school bus started so a 20 year old be watching a 6 year old show? You don't see that often.. :P

[eeedel]

@parkerpnut youd be surprised. im in my mid 20s and i still watch sesame street. hilarious show.

[parkerpnut]

@eedel lol I watch Blue's Clues and I'm in my teen years.. :P

[metalgearsolidrulez]

most people dont watch magic school bus when they are 10+ which this person most likly is.

[RamenNoodles22]

someone should slit their wrists in space and watch it spurt out blue!:O

[MSI2k]

They needed a vascular surgeon to explain this basic chemistry theory? Dumbasses. Blood is NEVER blue. Veins are NEVER blue. The deoxygenated blood in the veins is very dark red, and absorbs light in the red spectrum and does not reflect it. The skin refracts yellow light and the reflected color therefore is blue (RGB primary).

[gtxprince]

well make a video response if you can do better instead of complaining.

[BrandonC3]

@gtxprince He's not complaining, he's making a valid comment response.

[gtxprince]

you dont call somebody a dumbass for making a mistake complaining? yes it is a valid point but he is complaining

[BrandonC3]

You're absolutely right about the dumbasses comment. The rest of his comment was valid though. I think we're agreeing now.

[gtxprince]

yup. :]

[Z1BABOUINOS]

OMG!

Deep down, we're all ...Smurfs!

[tonyhoffmans]

chilll.... its blue because of the hemoglobyn en the Iron it contains ... happy...? jerk..

[rapaicruma]

Why? Tell me why do you spam us with so many "Why" videos?

I'm starting to think that unsubscribing might be a good idea...