What species is responsible for the red color of blood?
139476
It has to do with the iron, but not "because of the iron" per se. What happens in blood is that Iron forms a complex with the heme protein. Iron, in its 2+ configuration, has 6 valence electrons. In a (octahedral) complex, the d orbitals split to form 3 with a lower energy and 2 with a higher energy. Iron (2+) with the right ligand will have this structure. \n         \n             \neg    ___*____    _____*____ \n\n\nt2g  ___*_*_____   ______*___  ______*___<p>\n\nThe gap between the orbitals is called delta OH and it is large, because the SCN- ligand is a strong field ligand. So a lot of energy is needed to overcome the barrier. The other two considerations are that:<p>\n\n(1) The number of unpaired and paired electrons can't change (spin selection rule) \n(2) An electron can't transfer from a symmetical to an unsymmetrical orbital (La Porte Rule).\n\nCombining these affects, we see that blood is red (and FeSCN is red) because it absorbs blue light (higher energy) in order to effect the transition between eg and t2g, so we see red light.
871649
That is a very interesting question.\nno . . . . but there is one exception\nIn a camera flash, the light is reaching through the pigmentation\nto the retina, the light-sensitive membrane covering the back wall of the eyeball, which is the color red.\nthe only organisms that have eyes visibly red are ones that are albino\nalbino organisms have less melon(color) in there skin, hair, and eyes.\nresulting in the clear vision to their retina, which causes their eyes to be the color red.\n(i.e. white mice that have red eyes)
315713
A red blood cell. Haemoglobin is the red part of the blood within the cell
647445
No, Chimpanzees have different blood types, as do Monkeys of different species, as do Horses, as do Lions, as do many other animals.  It has something to do with workings of the immune system I think.
227306
They have carotenoid (sp?) in their exo skeleton, (think beta carotene in carrots) so when they are cooked, it turns that reddish color.
219455
because blood is blue.\n\nit only turns red when it oxidates/coagulates with oxygen.
356865
Probably,because it is red,red is a colour of love and it also has thorns,love hurts a lot.Also when it dies in autumn it reborns in spring and so on.
821922
it depends how much blood you have, if there's a lot, then it will appear a brick red color, but if its not so much, then it looks bright red untill it dries, then its brick red once again
208500
Perhaps the plants transpiration processes of; photosynthesis, CO2, & nitrogen along with other conditions, ie. H2O temp., Ph level, UV length of intensity play a part of the chemical transformation of plant material to become reddish in color.  Ideally, a micro nutrient of Fe (iron) would make a difference but not certain.
630374
Clear blood? That's funny.\n\nRed corpuscles carry oxygen and cause blood to be red. It doesn't turn red, it is red. When you have blood drawn it isn't exposed to outside oxygen and it is still red. Blood is exposed to oxygen every time you breath. If you don't breath, you turn blue. Run in a marathon, your face turns red. Simple as that.
361108
Blood is a liguid specially formulated to carry to every living cell of the body all the things essential to life - oxygen and other gases, iron and other minerals etc. It also helps to carry waste and toxins to organs that process them for disposal (lungs, liver, spleen etc). \n\nIn humans and the bigger animals its appearance is pretty obvious (red, gooey stuff), but in many small creatures and insects it is more mixed up with the general chemistry of the creature. They have less developed vascular systems (arteries and veins) and they don't process exactly the same chemicals as us so their 'blood' is a different colour and texture.\n\nFinally, even in humans there is more than one system for transporting stuff around - we also have our lymphatic system which contains a clear fluid called 'lymph'. It is vital in helping us to fight infections and when its working hard in our defence thats when you get swollen glands - these are the lymph nodes - factories for fighting the nasties transported there by the lymph - you have these all over, but especially in your throat, under your arms, in your groin etc. Its what the doctor feels for when you have a temperature.\n\nFascinating stuff!
501395
The colour of the blood underwater is moreover black. The reason behind it is- Red colour of blood is due to presence of oxygen. Thus heamoglobin at this moment is called oxy-haemoglobin. and its colour is red. When under water the amount of Oxygen is less and thus colour becomes more of blackish due to accumulation of CO2 and other gases along with hormones.
686805
In humans and other hemoglobin-using creatures, oxygenated blood is a bright red in its color. 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 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 before venous blood is exposed to air it is blue.
908467
Almost all vertebrates use the iron compound hemoglobin as the oxygen-transporting compound in their blood. Oxygenated hemoglobin is bright red, unoxygenated darker red. Many invertebrates use a copper compound rather than an iron compound to transport oxygen, so their blood is blue-green. I believe there is some arctic fish which also has blue-green blood, for the same reason.
284453
Red blood cells are red only because they contain a protein chemical called hemoglobin which is bright red in color. Hemoglobin contains the element Iron, making it an excellent vehicle for transporting oxygen and carbon dioxide. As blood passes through the lungs, oxygen molecules attach to the hemoglobin. As the blood passes through the body's tissue, the hemoglobin releases the oxygen to the cells. The empty hemoglobin molecules then bond with the tissue's carbon dioxide or other waste gases, transporting it away.
468481
ummmmmmmmmmmmmmmmmmmmm red
587615
oxygenated blood is red. deoxygenate blood is blue, you always bleed red because blood pulls the oxygen out of the air the same way  it would in your lungs, and yes it happens to everyone