2007-07-25 11:52:52 · 4 answers · asked by MR. BIG 1 in Science & Mathematics ➔ Biology
ACK!!!!! Why do people answer with blood being blue?!
Blood is never blue. In the absence of oxygen, blood is still red....always. The iron in the hemoglobin (the molecule responsible for carrying oxygen within the RBC) is what makes blood red. If there was a different metal within the hemoglobin, then the blood could be a different color. This can be seen in certain insects/crustaceans (some have green blood...I believe the metal is sulfur). People who claim that blood is blue either don't know their biochemistry or were taught wrong.
Cool thing...some people have actually acquired green blood due to an excessive amount of sulfur in their system. Check out this article...http://news.bbc.co.uk/2/hi/health/6733203.stm
2007-07-25 12:24:26 · answer #1 · answered by Kinase 3 · 1⤊ 0⤋
It's not blue like ink. It is just a darker red, sort of like a maroon colored car. If you have ever given blood, that is the color of the blood in your veins. The arteries are deeper under the skin and have higher pressure, so they are not appropriate to draw blood from. If you were mixing paint to get a darker red, you might mix in some blue paint to a brighter red to get the correct color. When I was getting white paint to paint my VW, the guy actually put in a slight amount of black!
Brady
2007-07-25 19:06:43 · answer #2 · answered by Brady B 2 · 0⤊ 0⤋
Arteries carry oxygenated (red) blood from your lungs to your muscles and organs. Veins return the deoxygenated (blue) blood to your heart and lungs. Even if you are bleeding from a vein, it's always red because the blood is immediately exposed to the air and becomes oxygenated.
2007-07-25 18:57:01 · answer #3 · answered by lithiumdeuteride 7 · 0⤊ 1⤋
Please quickly do an internet search on "circulatory system." You will find lots of information, pictures, diagrams, and examples of clear, correct English writing.
2007-07-25 19:33:16 · answer #4 · answered by aviophage 7 · 0⤊ 0⤋