Why is my blood blue?
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Ava Davis
Studied at the University of Cape Town, Lives in Cape Town, South Africa.
As a medical professional, I can tell you that human blood is not actually blue. The misconception that blood can appear blue may arise from a few different factors, but it's important to clarify that **fresh, oxygenated blood is typically bright red**, while deoxygenated blood is a darker red. Here's how I would address the concern:
English Answer:
Human blood is not blue under normal circumstances. The idea that blood might appear blue can stem from a misunderstanding of how light interacts with the skin and veins. When light passes through the skin, it can cause the veins to appear blue or green, but this is not an indication of the actual color of the blood within them. Blood color is determined by its oxygen content and hemoglobin levels.
Oxygenated blood, which is what you see in arterial blood, is bright red because it contains oxygen bound to hemoglobin.
Deoxygenated blood, found in veins, is a darker red because it has released oxygen to the tissues and picked up carbon dioxide.
If you are observing a blue color in what you believe to be blood, it could be due to a medical condition, a trick of light, or possibly contamination. It's also worth noting that certain medical conditions can affect the color of blood, such as cyanosis, which can make skin and mucous membranes appear blue due to low oxygen levels in the blood. However, this is a serious condition that requires immediate medical attention.
Translation:
作为医学专业人士，我可以告诉您，人体血液在正常情况下并不是蓝色的。血液可能呈现蓝色的想法可能源于对光如何与皮肤和静脉相互作用的误解。当光线穿过皮肤时，它可以使静脉看起来呈蓝色或绿色，但这并不是血液实际颜色的指示。血液的颜色由其含氧量和血红蛋白水平决定。氧合血，即您在动脉血中看到的，是鲜红色的，因为它含有与血红蛋白结合的氧气。未氧合血，在静脉中找到，是暗红色的，因为它已经将氧气释放到组织中并吸收了二氧化碳。
如果您观察到您认为是血液的蓝色，这可能是由于医疗状况、光线的把戏，或者可能是污染。同样值得注意的是，某些医疗状况可以影响血液的颜色，例如发绀，这可以使皮肤和粘膜因血液中的低氧水平而呈现蓝色。然而，这是一种严重的状况，需要立即就医。
**
English Answer:
Human blood is not blue under normal circumstances. The idea that blood might appear blue can stem from a misunderstanding of how light interacts with the skin and veins. When light passes through the skin, it can cause the veins to appear blue or green, but this is not an indication of the actual color of the blood within them. Blood color is determined by its oxygen content and hemoglobin levels.
Oxygenated blood, which is what you see in arterial blood, is bright red because it contains oxygen bound to hemoglobin.
Deoxygenated blood, found in veins, is a darker red because it has released oxygen to the tissues and picked up carbon dioxide.
If you are observing a blue color in what you believe to be blood, it could be due to a medical condition, a trick of light, or possibly contamination. It's also worth noting that certain medical conditions can affect the color of blood, such as cyanosis, which can make skin and mucous membranes appear blue due to low oxygen levels in the blood. However, this is a serious condition that requires immediate medical attention.
Translation:
作为医学专业人士，我可以告诉您，人体血液在正常情况下并不是蓝色的。血液可能呈现蓝色的想法可能源于对光如何与皮肤和静脉相互作用的误解。当光线穿过皮肤时，它可以使静脉看起来呈蓝色或绿色，但这并不是血液实际颜色的指示。血液的颜色由其含氧量和血红蛋白水平决定。氧合血，即您在动脉血中看到的，是鲜红色的，因为它含有与血红蛋白结合的氧气。未氧合血，在静脉中找到，是暗红色的，因为它已经将氧气释放到组织中并吸收了二氧化碳。
如果您观察到您认为是血液的蓝色，这可能是由于医疗状况、光线的把戏，或者可能是污染。同样值得注意的是，某些医疗状况可以影响血液的颜色，例如发绀，这可以使皮肤和粘膜因血液中的低氧水平而呈现蓝色。然而，这是一种严重的状况，需要立即就医。
**
Studied at the University of Amsterdam, Lives in Amsterdam, Netherlands.
Blood is always red, actually. Veins look blue because light has to penetrate the skin to illuminate them, blue and red light (being of different wavelengths) penetrate with different degrees of success. ... The oxygen-rich blood is then pumped out to your body through your arteries. It's bright red at this point.
2012-10-16
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Harper Gonzales
QuesHub.com delivers expert answers and knowledge to you.
Blood is always red, actually. Veins look blue because light has to penetrate the skin to illuminate them, blue and red light (being of different wavelengths) penetrate with different degrees of success. ... The oxygen-rich blood is then pumped out to your body through your arteries. It's bright red at this point.
