why haemoglobin is red in colour?
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 Haemoglobin contains a haem prosthetic group that has an iron atom at its centre.   When the iron is bound to oxygen, the haem group is red in colour (oxyhameoglobin), and when it lacks oxygen (deoxygenated form) it is blue-red.
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Oxygenated (arterial) blood is bright red, while dexoygenated (venous) blood is dark reddish-purple.
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Hemoglobin is a protein in red blood cells and hematocrit is a measurement of the amount of red blood cells as related to total blood cell count. Both hemoglobin and hematocrit are used to diagnose anemia.
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 Red blood cells are able to carry oxygen so efficiently because of a special protein inside them: haemoglobin.   In fact, it is the haemoglobin that is responsible for the colour of the red blood cell.   Haemoglobin contains a haem prosthetic group that has an iron atom at its centre.
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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.
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As bruises heal, the body breaks down spilled blood cells and their hemoglobin. The iron in hemoglobin is scavenged and reused, usually to form new red blood cells. The rest of the hemoglobin is decomposed into a green pigment called biliverdin, then converted to bilirubin, which is yellow or light brown.
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If you have noticed different colors in your period blood, it's usually normal. In most cases, the color change relates to how long the blood has been in the uterus. Your flow will change how long the blood remains in your uterus. You may see bright red blood on your heaviest days and brown blood on your lightest days.
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After air drying the slide is flooded with Maneval's solution, a combination of acetic acid and acid fuchsin. The acetic acid lowers the pH in the sample and causes the Congo red to change from red to blue. The acid fuchsin penetrates through the capsule and stains the cell a bright red.
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Hemoglobin is an oxygen-transporting protein found inside red blood cells (RBCs). There are several types of normal hemoglobin, but the predominant form – about 95-96% – is... Hemoglobin A1c, also called A1c or glycated hemoglobin, is hemoglobin with glucose attached.
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Hemoglobin is basically an Oxygen carrying compound. Carrying it inside red blood cells enables it to compartmentalize oxygen delivery, and be able to release it to tissues under the right conditions. Being inside the RBC ensures that the pH and ionic milleu is optimum for this function.
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A hemoglobin electrophoresis test is a blood test used to measure and identify the different types of hemoglobin in your bloodstream. Hemoglobin is the protein inside red blood cells responsible for transporting oxygen to your tissues and organs.
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Unlike many other cells, red blood cells have no nucleus and can easily change shape, helping them fit through the various blood vessels in your body. ... Blood appears red because of the large number of red blood cells, which get their color from the hemoglobin.
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A hemoglobin test measures the levels of hemoglobin in your blood. Hemoglobin is a protein in your red blood cells that carries oxygen from your lungs to the rest of your body. If your hemoglobin levels are abnormal, it may be a sign that you have a blood disorder. Other names: Hb, Hgb.
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Red blood cells contain a protein called hemoglobin that gives blood its red hue. Hemoglobin contains iron, which makes it an excellent vehicle for transporting oxygen and carbon dioxide. As blood passes through the lungs, oxygen molecules attach to the hemoglobin.
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Hemoglobin is a heterotetrameric oxygen transport protein found in red blood cells (erythrocytes), whereas myoglobin is a monomeric protein found mainly in muscle tissue where it serves as an intracellular storage site for oxygen.
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About red blood cells Red blood cells contain hemoglobin. Hemoglobin is an iron protein that carries oxygen to all body parts. When red blood cell levels are too low, the body parts do not get enough oxygen.
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Click on image for credit. This redox reaction (reduction followed by oxidation) is responsible for the colour change of the protein heme-group in the enzyme complex which is why the word cytochrome (colourful) is used to describe the enzymes.